I set up Google Analytics on two web sites at work. One is a test site, and one is the production site. There were quite a few problems setting it up; I gather from the support groups on google, and blog chatter that they are having a hard time meeting demand. I can totally sympathize. If my company's web site were dropped in front of 50 million users at once, we would crash and burn. Hard.
I'm rooting for them. I still feel like Google is the underdog.