Thread replies popup like pm's

Is it possible that in addition to receiving email notification of subscribed threads, that you get a popup box like when you receive a PM while you’re on the board.

Maybe this would be possible with our new board, or not?

Don’t get me wrong email notification is great, but always checking email when I’m in the forums is a little troublesome.

Don’t think this is featured in VBulletin 3, could not find it anyways.