Looks like I'm not going to Google IO after all. Even though I got a ticket 3 times, Google wallet wasn't able to take my money. Here's the official response I got:
Tickets for Google I/O 2013 have sold out. We understand that you experienced issues with our registration process. If you weren’t shown the registration form during the registration process, the process did not complete, and we apologize that we are unable to provide you a ticket to this year’s conference. We see that the charge to your account has already been cancelled.
We hope that you will join us for the live stream of the keynote, top sessions and our special Google Developers Live @ I/O programming.
Watch our Google Developers page for future updates on Google I/O. In the next few days we’ll be posting more on how to join a viewing event with I/O Extended. #io13
Google I/O Team