Index: applications/mobileblur/controllers/default.py
==================================================================
--- applications/mobileblur/controllers/default.py
+++ applications/mobileblur/controllers/default.py
@@ -27,5 +27,12 @@
             redirect(URL("index"))
         except Exception as ex:
             login_form.insert(-1, ex.message)
 
     return dict(login_form=login_form)
+
+
+def logout():
+    response.cookies["nb_cookie"] = ""
+    response.cookies["nb_cookie"]["expires"] = -10
+    response.cookies["nb_cookie"]["path"] = "/"
+    redirect(URL("index"))

Index: applications/mobileblur/views/layout.html
==================================================================
--- applications/mobileblur/views/layout.html
+++ applications/mobileblur/views/layout.html
@@ -102,10 +102,11 @@
 	      {{block left_sidebar}}Content Left Sidebar{{end}}		  
             </div>
           </div><!-- left_sidebar -->
 	  {{pass}}
 
+      <a href="{{= URL("default", "logout") }}">Log out</a>
 	  <!-- content -->
 	  <div id="content" {{=XML(style_content)}} >
 	    {{include}}	
 	  </div>
 	  <!-- content -->