Regarding RTGs:
All US: Main Street, Virtual Group, Bodog, 49er, Cyberbetting, Club USA, iNetBet, VIP Lounge, Casino Extreme, Shark, Vegas Magic, Atlantic Lounge, VEnezia Club, Crown Vegas
Some US: Crystal Palace/Crystalisle Group
No US: Wager Junction, Wager Profits, VIP Profits, Play United, Connecto, Betinternet, CanBet, Club UK/Euro