Here's a post I wrote over on the Project Fondue Blog about our use of Loggerhead with mod_wsgi under Apache. Loggerhead is the rather nice branch viewer for bazaar branches as used on Launchpad.net.
If you're not already subscribed to the Project Fondue blog feed then I can recommend it, as there should be some interesting posts coming out of there in the coming months (yes I'm unashamedly biased!).