If there were several things I would do to the forum -- all the bells and whistles aside -- it would be to get email when user hashmarks "make visible" to actually display without compromising the security of folders (which I'm not apt to do - running on XP and ASP.NET). I would also make sure that "aggregating forums" worked properly as an option, selecting threads across all groups and forum and not just some (might need to play with this more).  I would find a way to force HTML in signatures when HTML is selected without users having to use markup language. And I'd get that post-level notification working. Gee, no pressure here, huh?

I think the forum is one of the most useful and well-constructed modules there is and clearly a huge amount of work has gone into it. But there's my wish list anyway. :-)  V.