Registration for Google I/O went live this morning at 7:00am (PST) and only took mere 20 minutes or so to sell out. Google will probably come up with some last minute tickets and find a creative way to raffle them off, but in the meantime you can get yourself ready to watch the event via I/O Live or I/O Extended. If you’re really itching to attend and possibly score that free Android smartphone, tablet, or Chrome book then you might be interested in checking out eBay. Seller “quocbinh” from the United States has put a General Admission ticket online for a cool $4,000. Better hurry, the listing ends on March 30th at 10:49:58 (PDT).