diff --git a/addons/account/account_bank_statement.py b/addons/account/account_bank_statement.py
index 5601179e0fc..da3ca65c24b 100644
--- a/addons/account/account_bank_statement.py
+++ b/addons/account/account_bank_statement.py
@@ -127,6 +127,7 @@ class account_bank_statement(osv.osv):
     _order = "date desc, id desc"
     _name = "account.bank.statement"
     _description = "Bank Statement"
+    _inherit = ['mail.thread']
     _columns = {
         'name': fields.char('Name', size=64, required=True, states={'draft': [('readonly', False)]}, readonly=True, help='if you give the Name other then /, its created Accounting Entries Move will be with same name as statement name. This allows the statement entries to have the same references than the statement itself'), # readonly for account_cash_statement
         'date': fields.date('Date', required=True, states={'confirm': [('readonly', True)]}, select=True),
@@ -364,7 +365,7 @@ class account_bank_statement(osv.osv):
                     'name': st_number,
                     'balance_end_real': st.balance_end
             }, context=context)
-            self.log(cr, uid, st.id, _('Statement %s is confirmed, journal items are created.') % (st_number,))
+            self.message_append_note(cr, uid, ids, body=_('Statement %s is confirmed, journal items are created.') % (st_number,), context=context)
         return self.write(cr, uid, ids, {'state':'confirm'}, context=context)
 
     def button_cancel(self, cr, uid, ids, context=None):
diff --git a/addons/account/account_invoice.py b/addons/account/account_invoice.py
index d0f7579a86e..c7d643b404b 100644
--- a/addons/account/account_invoice.py
+++ b/addons/account/account_invoice.py
@@ -1002,7 +1002,7 @@ class account_invoice(osv.osv):
                 if obj_inv.type in ('out_invoice', 'out_refund'):
                     ctx = self.get_log_context(cr, uid, context=ctx)
                 message = _("Invoice  '%s' is validated.") % name
-                self.log(cr, uid, inv_id, message, context=ctx)
+                self.message_append_note(cr, uid, ids, body=message, context=context)
         return True
 
     def action_cancel(self, cr, uid, ids, *args):
@@ -1232,7 +1232,7 @@ class account_invoice(osv.osv):
             # TODO: use currency's formatting function
             msg = _("Invoice '%s' is paid partially: %s%s of %s%s (%s%s remaining)") % \
                     (name, pay_amount, code, invoice.amount_total, code, total, code)
-            self.log(cr, uid, inv_id,  msg)
+            self.message_append_note(cr, uid, ids, body=msg, context=context)
             self.pool.get('account.move.line').reconcile_partial(cr, uid, line_ids, 'manual', context)
 
         # Update the stored value (fields.function), so we write to trigger recompute
diff --git a/addons/crm_claim/crm_claim.py b/addons/crm_claim/crm_claim.py
index 792cfbc3e9e..bbb27b795bc 100644
--- a/addons/crm_claim/crm_claim.py
+++ b/addons/crm_claim/crm_claim.py
@@ -127,8 +127,6 @@ class crm_claim(crm.crm_case, osv.osv):
         for l in self.browse(cr, uid, ids):
             # When coming from draft override date and stage otherwise just set state
             if l.state == 'draft':
-                message = _("The claim '%s' has been opened.") % l.name
-                self.log(cr, uid, l.id, message)
                 stage_id = self.stage_find(cr, uid, l.section_id.id or False, [('sequence','>',0)])
                 if stage_id:
                     self.stage_set(cr, uid, [l.id], stage_id)
diff --git a/addons/project_scrum/project_scrum.py b/addons/project_scrum/project_scrum.py
index 85eba636b90..d34669df255 100644
--- a/addons/project_scrum/project_scrum.py
+++ b/addons/project_scrum/project_scrum.py
@@ -44,6 +44,7 @@ class project_scrum_sprint(osv.osv):
     _name = 'project.scrum.sprint'
     _description = 'Project Scrum Sprint'
     _order = 'date_start desc'
+    _inherit = ['mail.thread']
     def _compute(self, cr, uid, ids, fields, arg, context=None):
         res = {}.fromkeys(ids, 0.0)
         progress = {}
@@ -71,28 +72,27 @@ class project_scrum_sprint(osv.osv):
 
     def button_cancel(self, cr, uid, ids, context=None):
         self.write(cr, uid, ids, {'state':'cancel'}, context=context)
+        self.cancel_send_note(cr, uid, ids, context=None)
         return True
 
     def button_draft(self, cr, uid, ids, context=None):
         self.write(cr, uid, ids, {'state':'draft'}, context=context)
+        self.draft_send_note(cr, uid, ids, context=None)
         return True
 
     def button_open(self, cr, uid, ids, context=None):
         self.write(cr, uid, ids, {'state':'open'}, context=context)
-        for (id, name) in self.name_get(cr, uid, ids):
-            message = _("The sprint '%s' has been opened.") % (name,)
-            self.log(cr, uid, id, message)
+        self.open_send_note(cr, uid, ids, context=None)
         return True
 
     def button_close(self, cr, uid, ids, context=None):
         self.write(cr, uid, ids, {'state':'done'}, context=context)
-        for (id, name) in self.name_get(cr, uid, ids):
-            message = _("The sprint '%s' has been closed.") % (name,)
-            self.log(cr, uid, id, message)
+        self.close_send_note(cr, uid, ids, context=None)
         return True
 
     def button_pending(self, cr, uid, ids, context=None):
         self.write(cr, uid, ids, {'state':'pending'}, context=context)
+        self.pending_send_note(cr, uid, ids, context=None)
         return True
 
     _columns = {
@@ -138,6 +138,39 @@ class project_scrum_sprint(osv.osv):
             v['date_stop'] = (datetime.now() + relativedelta(days=int(proj.sprint_size or 14))).strftime('%Y-%m-%d')
         return {'value':v}
 
+    # ----------------------------------------
+    # OpenChatter methods and notifications
+    # ----------------------------------------
+
+    def create(self, cr, uid, vals, context=None):
+        obj_id = super(project_scrum_sprint, self).create(cr, uid, vals, context)
+        self.create_send_note(cr, uid, [obj_id], context=context)
+        return obj_id
+
+    def draft_send_note(self, cr, uid, ids, context=None):
+        for obj in self.browse(cr, uid, ids, context=context):
+            self.message_append_note(cr, uid, [obj.id], body=_("Sprint has been set to <b>draft</b>."), context=context)
+
+    def create_send_note(self, cr, uid, ids, context=None):
+        for obj in self.browse(cr, uid, ids, context=context):
+            self.message_append_note(cr, uid, [obj.id], body=_("Sprint has been <b>created</b>."), context=context)
+
+    def open_send_note(self, cr, uid, ids, context=None):
+        for obj in self.browse(cr, uid, ids, context=context):
+            self.message_append_note(cr, uid, [obj.id], body=_("Sprint has been <b>opened</b>."), context=context)
+
+    def pending_send_note(self, cr, uid, ids, context=None):
+        for obj in self.browse(cr, uid, ids, context=context):
+            self.message_append_note(cr, uid, [obj.id], body=_("Sprint has been set to <b>pending</b>."), context=context)
+
+    def cancel_send_note(self, cr, uid, ids, context=None):
+        for obj in self.browse(cr, uid, ids, context=context):
+            self.message_append_note(cr, uid, [obj.id], body=_("Sprint has been <b>cancelled</b>."), context=context)
+
+    def close_send_note(self, cr, uid, ids, context=None):
+        for obj in self.browse(cr, uid, ids, context=context):
+            self.message_append_note(cr, uid, [obj.id], body=_("Sprint has been <b>closed</b>."), context=context)
+
 project_scrum_sprint()
 
 class project_scrum_product_backlog(osv.osv):
diff --git a/addons/project_scrum/project_scrum_view.xml b/addons/project_scrum/project_scrum_view.xml
index 183d6fc3c92..1cf954f62b9 100644
--- a/addons/project_scrum/project_scrum_view.xml
+++ b/addons/project_scrum/project_scrum_view.xml
@@ -232,7 +232,8 @@
             <field name="model">project.scrum.sprint</field>
             <field name="type">form</field>
             <field name="arch" type="xml">
-                <form string="Scrum Sprint">
+                <form string="Scrum Sprint" layout="manual">
+                <sheet layout="auto">
                     <group colspan="4" col="6">
                         <field name="name" select="1"/>
                         <field name="project_id" on_change="onchange_project_id(project_id)"/>
@@ -307,6 +308,10 @@
                         <button type="object" string="Close" name="button_close" states="open,pending" icon="terp-dialog-close"/>
                         <button type="object" string="Set to Draft" name="button_draft" states="cancel,done" icon="gtk-convert"/>
                     </group>
+                    </sheet>
+                    <div class="oe_form_sheet_width">
+                        <field name="message_ids_social" colspan="4" widget="ThreadView" nolabel="1"/>
+                    </div>
                 </form>
             </field>
         </record>
diff --git a/addons/project_scrum/wizard/project_scrum_backlog_sprint.py b/addons/project_scrum/wizard/project_scrum_backlog_sprint.py
index 72b80a969fb..89ed7a8428a 100644
--- a/addons/project_scrum/wizard/project_scrum_backlog_sprint.py
+++ b/addons/project_scrum/wizard/project_scrum_backlog_sprint.py
@@ -24,6 +24,7 @@ from tools.translate import _
 class backlog_sprint_assign(osv.osv_memory):
     _name = 'project.scrum.backlog.assign.sprint'
     _description = 'Assign sprint to backlogs'
+    _inherit = ['mail.thread']
     _columns = {
         'sprint_id': fields.many2one('project.scrum.sprint', 'Sprint', required=True, help="Select Sprint to assign backlog."),
         'state_open': fields.boolean('Open Backlog', help="Change the state of product backlogs to open if its in draft state"),
@@ -55,12 +56,12 @@ class backlog_sprint_assign(osv.osv_memory):
                     'remaining_hours':backlog.expected_hours,
                 })
                 message = _("Product Backlog '%s' is converted into Task %d.")  %(backlog.name, task_id)
-                self.log(cr, uid, backlog.id, message)
+                self.message_append_note(cr, uid, ids, body=message, context=context)
             if data.state_open and backlog.state == "draft":
                 backlog_obj.write(cr, uid, backlog.id, {'state':'open'})
             sprint = sprint_obj.browse(cr, uid, data.sprint_id.id, context=context)
             message = _("Product Backlog '%s' is assigned to sprint %s") %(backlog.name, sprint.name)
-            self.log(cr, uid, backlog.id, message)
+            self.message_append_note(cr, uid, ids, body=message, context=context)
         backlog_obj.write(cr, uid, backlog_ids, {'sprint_id': data.sprint_id.id}, context=context)
         return {'type': 'ir.actions.act_window_close'}
 
diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index 687221f371b..97fe017ce62 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -290,8 +290,6 @@ class purchase_order(osv.osv):
             for line in po.order_line:
                 if line.state=='draft':
                     todo.append(line.id)
-            message = _("Purchase order '%s' is confirmed.") % (po.name,)
-            self.log(cr, uid, po.id, message)
 #        current_name = self.name_get(cr, uid, ids)[0][1]
         self.pool.get('purchase.order.line').action_confirm(cr, uid, todo, context)
         for id in ids:
@@ -327,9 +325,7 @@ class purchase_order(osv.osv):
             # Deleting the existing instance of workflow for PO
             wf_service.trg_delete(uid, 'purchase.order', p_id, cr)
             wf_service.trg_create(uid, 'purchase.order', p_id, cr)
-        for (id,name) in self.name_get(cr, uid, ids):
-            message = _("Purchase order '%s' has been set in draft state.") % name
-            self.log(cr, uid, id, message)
+        self.draft_send_note(cr, uid, ids, context=None)
         return True
 
     def action_invoice_create(self, cr, uid, ids, context=None):
@@ -433,8 +429,7 @@ class purchase_order(osv.osv):
 
         for (id, name) in self.name_get(cr, uid, ids):
             wf_service.trg_validate(uid, 'purchase.order', id, 'purchase_cancel', cr)
-            message = _("Purchase order '%s' is cancelled.") % name
-            self.log(cr, uid, id, message)
+        self.cancel_send_note(cr, uid, ids, context)
         return True
 
     def _prepare_order_picking(self, cr, uid, order, context=None):
@@ -688,6 +683,9 @@ class purchase_order(osv.osv):
      
     def invoice_done_send_note(self, cr, uid, ids, context=None):
         self.message_append_note(cr, uid, ids, body=_("Invoice <b>paid</b>."), context=context)
+        
+    def draft_send_note(self, cr, uid, ids, context=None):
+        return self.message_append_note(cr, uid, ids, body=_("Purchase Order has been set to <b>draft</b>."), context=context)
     
     def cancel_send_note(self, cr, uid, ids, context=None):
         for obj in self.browse(cr, uid, ids, context=context):