Any update on this?  I'm about to upgrade my CS2007 forums to CS2008 beta 2. If it makes things easier, I don't have the chat room integrated into the actual forum listings...just a link to the chat section in the Nav bar.  I mainly just want to make sure when users are logged into the site (cs2008 forum), that they'll still be logged in automatically if they go to the chat rooms to enter them.