Its called Mercurial, here is a google talk: http://video.google.com/videoplay?docid=-7724296011317502612 and here is a good white paper to start http://www.selenic.com/mercurial/wiki/index.cgi/Presentations?action=AttachFile&do=get&target=ols-mercurial-paper.pdf -- Freedom is nothing but a chance to be better. Albert Camus