I'm still using SVN for the simple reason that version-control is the last thing I want to experiment with. It's my last line of defense against the disaster of losing work. I disregarded this a while back and tried SVK and I paid the price big-time when it ate a bunch of code I'd just written.

Of course if I wanted to contribute to a project that was already using Git or Hg I'd be willing to give a try, but for my own projects I prefer something maximally reliable.

-sam