I have xfire to. Its really cool and needy. U can join games by other users, by right clicking their name and it takes u to the server there on. But yes I think it would bring more people to AH.
Just think having 3 MAs each one almost packed. Just think the $15 dollars a month thing would drop down to $10 dollars. (LoL probably not, but it could happen) But it would really help, cuz when me and my friends play H2H and the rooms are about to be full, they ask me to join and they say hurry, and when I hurry i either hit offline, or online, or my loading goes slower then the room is full. If AH2 was added to xfire, I could join there room within seconds. You can also send massive files threw xfire, and still play a game with little lag. U can send new photos u took within seconds, without having to email them. U can send new sound, gun files, or more with xfire to your buddies while there playing. Its really neat. You could do squad missions with a scout and takes an xfire picture and then u can send it to your bomber crews or fighters or leader and show them what the nearby field has up, or whats been hit.
IMO this would help AH players alot.