6 Startup LevelUp (formerly Scvngr) ran around in orange T-shirts and madesure guests could pay via its app at many of the food stands inside theconvention center.
4 AT&T setup a dome you could walk into called "Teleport." On the screen youcould select a place to visit in Austin, and the screen would surround you witha picture of it, making it feel (sort of) like you were there.