user-messages is an application for allowing users of your Django site to send messages to each other.

Include user-messages in your requirements file and add "user_messages" to your INSTALLED APPS setting.

Once you have the user-messages installed, hook up the URLs:

urlpatterns = patterns("",
    # some cool URLs

    (r"^messages/", include("user_messages.urls")),

    # some other cool URLs
)

Now all you need to do is wire up some templates.