There is a well used "MercurialHub", it's called BitBucket:
https://bitbucket.org/
It supports Git now as well, but it was only for Mercurial use when it started.
It supports Git now as well, but it was only for Mercurial use when it started.
Not sure if it's still django though.
You might be thinking of http://beanstalkapp.com/ which supports svn.
> Over the past couple of months, I've been working on creating a simple but powerful hosting service for Mercurial.