As per your general comments idea, I hadn't thought of that. Were you thinking of adding commit messages per module as comments on the bug tracker? What about notifications?
Oh, yeah, notifications is something else that comes for free with forums. OK, maybe just some custom skinning on forums then :)
Also I see "make new post" type links ... I'm a sitewide admin so maybe regular users don't see these but if you do some skinning of this you could just leave the links out.
We should be thinking about moving this all this stuff to a portal/portlet based thing down the line (in other words the project subsites).
But of course we don't want to slow down roll-out so we'll leave that idea for the future.