I am looking for the equivalent of a mercury + bazaar hg- git. I intend to use this for casual collaboration in order to avoid learning the quirks and tricks surrounding YAVCS: I would prefer to use one client for as many operations as possible and thus avoid investing time for a tool that is not useful to me.
Well, you will get bzr-hg (https://launchpad.net/bzr-hg), but it is not complete yet. You also get bzr-svn and bzr-git, so I use the bazaar as one of the tools to access everyone, but it does not always work perfectly.