Just a suggestion.

[RegretZ]

I may be alone here, but I figured I'd put this idea forth.
Personally, although I find forum pm's to be useful for leaving someone a reminder, or making sure someone hears you when they get back online, it isn't the most convenient form of instant chat.

Maybe, sometime in the future, a chat system might be nice? Like a bar at the bottom of the screen, mimicking what facebook and many other social sites have. If that's a possibility, that is.