[teh_r4v3]

Our team uses SVN right now. We have used CVS as well in the past, but we migrated over last season. So far SVN has been much nicer. TortoiseSVN is great, ViewVC is nice if your host supports it (or if you're running your own server), and even the CLI tools are nicer.

As for running the server, our team's web host (Dreamhost) fully supports SVN repositories and ViewVC on the server (there are even tools in the site control panel for it), but I know that many do not. If you can't run it on a web server, it shouldn't be too hard to run it on somebody's computer at home (that's what we did with CVS for two years).