I've moved off SVN as my source control system for some time, and I've been using both Git and Mercurial in its place. I was using Mercurial until I started doing work in Rails, and it doesn't make a whole lot of sense to use Mercurial for my Rails work seeing how many of the libraries I depend on are in Git/Github.

And as inviting as Bitbucket is after its purchase by Atlassian (5 devs for free!), I have a feeling that I'll be spending a lot more time (and money) on "the Githubs" in the future.