Hey, I'm sorry to keep nagging, but I'm thinking of more features which could make this one of the best hacks here.
If you could somehow set it up so that each users' blog could be accessed at a simple, unique url that would rock. I don't know if this is easy, but something like:
www.yourdomain.com/journal/username
which would point to their journal, probably just as a redirect page. This would make it easier for them to point other browsers to their blog, and build their reciprical link.
Ideally, admin could toggle this off and on, since they may want to direct traffic through their central forum to get to the blogs.
jEd