not to plug my own site, which hasn't been launched yet, but how about something with a format like this:
www.viraldiscussion.com
It's not a forum, but does allow people to vote. I know it loses it's affect for some people because they like the forum layout, but I was going for more of a resource, get the latest news type site vs a forum site.
not trying to thread jack but perhads a forum that lets you vote like my site but that also is more of a forum layout. Instead of the threads being on top because it was "bumped" a million times, but because it was voted as a great thread.