If you're attending, be sure to check out the Virtual Globes sessions, which are in their fourth year. They're a great line-up of oral and poster sessions that illustrate interesting and innovative uses of Google Earth, KML, and other modern mapping tools in the geosciences. The "oral sessions" (i.e. talks) are on Tuesday, while the posters are on Wednesday and Thursday. As was the case in prior years, Virtual Globes "posters" are really large plasma screens running cool science and GIS demos :).
If you're not attending this year, you can still catch some of the talks online. One of the oral sessions is being webcast live! The fun starts at 10:20am Pacific time today (18:20 GMT). We also videotaped a few of the speakers delivering their talks outside of the conference, and will be posting those soon.
Last but certainly not least -- we have a Liquid Galaxy on hand in Google's exhibitor booth at the conference. Come check it out, at booth #839. It's quite an experience.