The Release candidate version of Mercurial 2.5 was released last sunday.
This new version makes a major change in the way "hidden" changesets are handled. In 2.4 only hg log (and a few others) would support effectively hiding "hidden" changesets. Now all hg commands are transparently compatible with the hidden revision concept. This is a considerable step towards changeset evolution, the next-generation collaboration technology that I'm developing for Mercurial.
The 2.5 cycle is almost over, but there is no time to rest yet, Saturday the 2th of February, I will give a talk about changeset evolution concept at FOSDEM in the Mozilla Room. This talk in an updated version of the one I gave at OSDC.fr 2012 (video in french).
The week after, I'm crossing the channel to attend the Mercurial 2.6 Sprint hosted by Facebook London. I expect a lot of discussion about the user interface and network access of changeset evolution.