BryceTalk
Taking what we had learned from MetaSquares, we set about building a community around one of our graphics tools, Bryce. We built a chat environment that matched the aesthetics and needs of the Bryce users, and made it available from within Bryce itself. It was a special place for the artists to meet and exchange tips & tricks and share their work with one another. It became a great tool for spurring on creativity and helping people through rough spots.
Check out Meaning of BryceTalk for users' thoughts on the app, and Susan Kitchens' My Take On BryceTalk for more history (written just as the service was going down).