Currently it works as a Ruby interface to Mercurial, but they are aiming high. According to their own definition, “[their] goal is to produce a piece of software that lets you forget that you’re working on git project one moment and a Mercurial project the next.” A sort of meta-interface for most modern distributed VCS’s out there, so that you can use them all with the same set of commands, or maybe even interact between different VCS’s. Although I haven’t had the time yet to truly play with it, It appears to be highly customizable.

BTW, they also mention svn and cvs as VCS’s they want to support, but I can’t see why to drain out resources into these dinosaurs. I still don’t get why people still use centralized-only VCS’s if they have the choice of distributed version control. But anyway, I wish them good luck with the project overall, and I will sure keep an eye on it for a while.