Wow! There seems to be quite a few sites about Pong out there! There’s the previously mentioned game of Radial Pong, this fancy Flash movie about Pong not just being a game (and how those bats are really controlled), a quite infuriating and difficult Shockwave game of 3D Pong (I managed a final “high” score of 121), a 3 slightly less high-tech looking versions are also available and there is even a nice text based version available (“The enemy, the Left Paddle, has managed to reflect your shot and send it back to you. It looks like it’s going to go below your paddle”).
Pong your heart out!