A friend of mine worked at a company where he apparently presided over a month long flame war about what version control system to use. He got sick of it and just dictated that svn would be used, henceforth. I think people get altogether too excited about something that should be a fairly conservative part of your business. Innovation in source code management is not likely to be that big a win, although I guess if you're getting started, going with something more modern like git might be smart.