When GDM is installed it gives you a 'New Login' entry in
Applications->System submenu. I suggest moving it to Action panel menu,
just above the logout option. Seems just more logical there from the
usability point of view. It could be done the same way the find file tool
is dealt with ie. check whether GDM is installed and if so, place  the menu
entry there. I tried to patch the panel code and even got to the point,
where selecting the new menu option would actually run new login
(gdmflexiserver) but I was unable to deal with drag'n'drop from menu to
panel (any option from 'Actions' submenu when dragged was something
different than should have been, like icon supposed to log me out spawned a
'find file' window). So I left it there, but it gave me the impression of
not being to difficult to achieve. At least for someone who has a clue
about the panel code. :)