These are good days for Mercurial, the Python-based distributed version control system. First Python chooses Mercurial. Then Google Code announces support for Mercurial, the first DVCS it supports. Now ActiveState comes out with Workspace, its project hosting product, which supports Subversion, git, and you guessed it, Mercurial.
I don't understand the reasons why Mercurial is getting all the headlines these days over Bazaar, which has a number of high-profile users of its own.
But I've liked Mercurial since choosing it and Bitbucket for hosting Coverage.py. I'm glad that a clear leader is emerging among the non-git DVCS systems. It makes decisions easier.