Campfire - group chat

Campfire is a group based chat application. It works kind of like IM, but it is optimized for three or more people. Neat idea. They can handled 2-60 people. You can share files, look at images and check back on old chats (wow - someway to keep people accountable for what they chat about). The same guys built Basecamp and Backpack. They work at 37 signals