Play Bridge Online

The best place to play bridge online is BridgeBase Online. Their software is free. There is a new beta version baesd on Flash which runs on Macs and Linux as well as PCs (available here) Various members of the UCLA bridge team are online fairly frequently, including Blake Haas (blakers), Dan Aharoni (daharoni), and John Lu (John Lu).

BridgeBase also includes the Learn to Play Bridge software, which is an excellent (and free) introduction to the game of bridge.