loginwindow is a little helper application activates the loginwindow without terminating your current session. The difference between this product and the built-in fast user switching in Panther is that this app doesn't display the entire user name in the menu bar, thus saving your menu bar space for better things.
The fast switch menu always displays the full user name and thus takes away a lot of the limited menu bar space I have on my iBook. This utility allows me to use fast switching without sacrifying a lot of my menu bar to this function.
of course panther does this in the fast user switching menu.
i suppose this is for people who don't want that big fat menu item up there. just run this and switch without the massive menu object always being visible.
after all, this app is free.