So I find that more often then not, I'm in the middle of a game and I get an invite from friends to play. I hate feeling like I'm being rude and ignoring the requests but sometimes I'm kickin' butt and I don't want to end my current game. I suggest three colors for the dot in the friends list be used to indicate a players online status.
Green = Online, accepting invites
Yellow = Online, in the middle of a round but accepting invites
Red = Online; not accepting invites (ie. in the middle of a tourney)
Also, I was wondering if you guys will be implementing an IM feature.