[Ipstenu (Mika Epstein)]

I go by software, honestly. You can make a blog look (and act) like a forum and vice versa, but at the end of the day, they are different softwares with different requirements and different results when do certain actions.

What you’re describing isn’t a blog or forum anymore, though, it’s a community and you may want to look at something like BuddyPress, which is based on WPMU and integrates forums (I think… I haven’t tried it yet, though I have poked at it a little).