Concurrent Versions System(CVS) or any Version system(SVN, Bazaar, Source Safe) is the best thing for programmers ever. Using CVS, me and my friends Grant and Dallas are able to program together, apart. This helps working on a program since I have the exact opposite work/sleep schedule as both of them.
If you are working on a digital group project, I would suggest trying to set up a Linux/CVS server.
