I'm catching up on the mailing list for mercurial from the past couple of months. A couple really neat things in there:
* Mercurial Quick Reference Cards. These are really awesome. I've got to print out copies for all my interns on Monday, as they are just wonderfully done.
* Distributed Bug Tracking in Hg. This is based on the Bugs Everywhere concept. This looks really handy as a way of keeping todos in a source tree itself. Ah, I love hg. :)