A couple of cool sessions today. I especially enjoyed Brian Butler's talk on topic spaces in digital communities. He was basically simulating how signal-to-noise ratios affect community membership under various circumstances (such as high or low message process cost). In the afternoon I took an extended nap (conferences are hard work, even if you are not interested in job placement talks ;-)) before doing a short touristy sightseeing trip. In Atlanta you can visit the Aquarium, the Coca-cola museum, or CNN. Unfortunately, the were no more CNN studio tours, so I simply had a Burger at Wendy's and watch CNN for an hour... Although interesting, I am looking forward to going back tomorrow.