This may be a bit early, but if anyone is thinking about activites yet it's a suggestion. The activities don't necessarily have to be major attractions of the chosen city (presumably Seattle). It's generally more fun to go to things that are just enjoyable and allow socializing, such as the LAN party and Playdium at EC2005. Laser tag and bowling are two activities that are usually very successful and enjoyable. People who live in Seattle or know it well should suggest places that they would go themselves with their friends.