Thought provoking video of Linus on GIT.
Pretty compelling.
I got burned a while back when I discovered the huge merge bug in Subversion (the fact that you can only do it once). I started looking around a while ago and transitioned to SVK over a subversion repo. At work we are using Bazaar. I still like SVK and Bazaar, but I’m always interested in new and better technology.
Basically, it looks like GIT and Mercurial are the systems to watch.