trac+bzr
I didn't find any current development work being done on the trac+bzr plugin so I went ahead and started my own branch. See the changelog down below for more information on specific bugs fixed. If you notice any, be sure to report them on launchpad (no, the irony is not lost on me).
Downloads
In development, get it out of bzr:
bzr branch http://code.timhatch.com/bzr/trac/trac+bzr-thatch-dev
Contributing
I welcome patches, suggestions, and bugreports. Send me an email to code@timhatch.com