Bitbucket never supported svn (and still doesn't), it was created with django + uses the pure python mercurial (It was one of the major "posterchild" stories for django).

Not sure if it's still django though.

You might be thinking of http://beanstalkapp.com/ which supports svn.

Just re-read the original announcement, it was definitely a mercurial only hosting.

> Over the past couple of months, I've been working on creating a simple but powerful hosting service for Mercurial.