One of Austin's claims to fame is its bats. Went to some great sessions yesterday, but the highlight of the day was my evening excursion, with about 50 other people from the conference and hundreds of locals and tourists, to see more than a million Mexican free-tailed bats emerge from under a downtown bridge a few blocks from the hotel. They were very hard to see as individuals; it was more like a continuous stream of insects heading out over the trees along the river. Very cool.