I'm now at Copenhagen to attend the mercurial "2.3" sprint.
About twenty people are attending, including staff from Atlassian, Facebook, Google and Mozilla.
I expect code and discussion about various topic among:
I'm of course very interested in the Obsolete Markers topic. I've been working on an experimental implementation for several months. An handful of people are using them at Logilab for two months and feedback are very promising.