Finally, the amazing user interface of git combined with the legendary server-side performance and scalability of mercurial!
What scalability/server-side performance issues are you referencing?
It'd be really cool if this could be bridged server-side -- there's a bunch of Python libraries on bitbucket that would be nice to be able to track as git submodules without adding a client-side burden.
use pip to manage this:
pip -E INST install hg-git
export PYTHONPATH=$PWD/INST/lib/python2.6/site-packages