Fast User Switching

Are you a fast user switcher?
I’m a huge fan of this Panther feature: I use it for security reasons on my Powerbook, and because I’ve got a bunch of different users on the desktop G4.
The only thing I didn’t liked was the waste of menu bar space (OsX writes the current user logged in on it), but you can read my complaint here.
If you’re like me, and don’t like to waste precious space on your menu bar, even with a 17” wide screen, download immediately WinSwitch (via Guigalaxy).
You can replace the username in the bar with a generic icon, custom user icon or short user name - neat!
It’s donationware, and you can even download the source code, avaiable under a BSD license.