I'm happy so far, but I wanted to say I think it is misleading to say: "you can import all of your existing source code from Subversion directly into Bitbucket". On close inspection, for subversion, you only import the head - not the whole repo, which is the whole point of a repo! And the link in: "We recommend reading the blog entry,"Goodbye Subversion, Hello Mercurial: A Migration Guide" to learn about best practices when migrating to DVCS from Subversion." Is not the best place to start. It took me another hour of research to find the best practices for us with Windows32, so I think it would be much better if you could link to a faq/support page where you summarise best options for different situations.
FYI, we found this was best for us - great recent tutorial with screenshots: http://nicobo.net/articles/migrating-subversion-mercurial