What's It Like to be Google's Boss Techie?

We'd like to welcome Google Director of Technology Craig Silverstein as our next Slashdot interview victim... err... guest. You think you run a big Linux server farm? Craig's is bigger. Think your Web site gets a lot of traffic and creates a lot of headaches? Just think what Craig must face! Post whatever you'd like to ask Craig below, one question per post. About 24 hours after this runs we'll email Craig 10 of the highest-moderated questions, and we'll post his answers shortly after he gets them back to us.