They advertise 4G like it is pretty much everywhere. Here is the complete list of cities that have 4G in California as of today.

http://sethgodin.typepad.com/seths_blog/2010/08/professionals-amateurs-and-the-great-unwashed.html

http://www.wired.com/gamelife/2010/08/xbox-live-price-increase

http://www.wired.com/wiredscience/2010/08/do-gooder-dislike

I cannot find that on my keyboard.