Hey! I just wanted to share a fun online multiplayer poker site I just found out about. You can play in single/multi table tournaments or open tables where people can come and go.
http://www.triplejack.com/
Membership is free but you can upgrade to get additional features (leveling up, more avatars, custom pics, win actual prizes, etc).
Upgrading is optional, as the site is already very playable for a free game.