I like the way Mac OS switches users (e.g. a dropdown at the top left of the screen). Is there such a thing for Windows XP? Because the way it's currently implemented on Windows XP (and Vista/Win7) is a real hassle involving a dozen clicks.
The current user doesn't have to be logged off?
Else use Windows+L to select a different user
The user has to be logged off?
Use AutoHotKey to make Windows+L log off your current user
Fast user switching?
If you have to type user names you should enable Fast User Switching to give the icons for each users instead