Great news that MySQL has migrated it's source code from BitKeeper over to Bazaar. Interestingly the featureset and openness are cited as the main reasons for the switch to bazaar over several alternatives (which weren't listed).
In addition to the move to bazaar, Mysql are also using launchpad as their code repository though bugs will remain hosted at http://bugs.mysql.com/.
It's great to see such a well respected project move over to bazaar, and I can see why - bazaar does make it much more easy for communities to contribute to a project whilst minimising the overhead of dealing with the community contribution.
Let's hope this move inspires others, I for one would love to see the YUI look at openning up to increased community contribution by hosting their branches on launchpad.net.
For more info the official annoucement is here on the MySQL blog.