Absolute Poker has really stepped up in the online poker community. By still accepting US players, the traffic has tripled within the past year. Overall, Absolute Poker is an excellent choice.
If you like Poker.com than you will be a fan of Carbon Poker. Carbonpoker.com is basically Poker.com sharing the same network and features. The only difference is their logo.
Full Tilt Poker is a great place to play poker online.The software is excellent with cartoon style avatars which include Full Tilt's award winning graphics. Not to mention the Pro endorsers such as Phil Ivey.
Poker Stars is quickly becoming the worlds largest online poker room. They accept US players and have enormous amounts of player traffic due to this. This site is a great choice overall.
Ultimate Bet Poker is one of the senior members in the online poker community and because of this, they are very much liked by players. Annie Duke and Phil Hellmuth are a few that endorse them.