writes "Riley Lynch has released Space.dock, which brings multiple desktops to Mac OS X. He's provided the code and binaries through SourceForce.net.
It runs pretty well for being a 0.7 release and sure beats hiding all your applications and just opening the one you'd like."
This is a cool little program. I usually question how much I really need virtual desktops, but I never fail to use them when I have them available.