I don’t want to come down too hard on Google Wave. It’s in alpha release, and the biggest problem with it is that people don’t have accounts. Nevertheless, I haven’t really been checking it because after a flurry of sandbox-like posts, there wasn’t much activity.
I decided to start a Wave with my LOST watching buddies, all of whom are all around the country, and it’s been working out so far. My plan is to set up a wave for every episode this season. My friends on the East coast can use it like a chat room while watching it live, and I can check it after I watch the episode and participate in the post-mortem, even if nobody is still online.