http://www.vbulletin.org/forum/showthread.php?t=102965

There might be a newer version out. Here's an example of it in action.

http://forums.nasioc.com/forums/itrader.php?u=14715

And here's the "threaded" version in action.

http://forums.nasioc.com/forums/show....php?t=1170292

Really cool feature that we could use on these forums. Come on admins, get to work! Or let me work for you