I'm still working on the following scenario:
To have a simple login meachnism on the top of the page
1) Use Case: user not logged in - OK
provide FB Button and Login link
- FB Button - ok once {JFBCLogin} fixed
- Login is simple link to page with real login form (could be CB login form or FB login form)
2) Use Case: User logged in
provide one logout link that loggs out user from Joomla (& optional Facebook)
- I used something like <a href="" onclick="javascript:jfbc.login.logout_button_click()"><?php echo JText::_('Logout') ?></a>
Effect is that user is logged out from Facebook but not from Joomla

Any idea how I logoff the user from Joomla (and depending on settings also from Facebook). Scenario would work with normal JFBC module logoff button. But I can't display the full module. I can only display a link.
Rgds
Lars