In order to get a notice on IRC whenever someone merges a change in Mahara, we picked the cia.vc service. This allows us to keep an eye on what is happening with the codebase.
If you want to replicate our setup, start by creating an account on cia.vc and then add a new project and an IRC bot to your account.
While talking about how Mahara uses Gerrit and Gitorious for code reviews, I forgot to include details on how to link bugs in the commit logs to our bug tracker (Launchpad).
The Mahara project has just moved to mandatory code reviews for every commit that gets applied to core code.
Here is a description of how Gerrit Code Review, the peer-review system used by Android, was retrofitted into our existing git repository on Gitorious.