After April 10th, Google will randomly select names from the list of those who registered, and those selected will have the opportunity to attend. This year, the conference will take place on June 25th and June 26th at the Moscone Center. For those who can't attend, Google usually publishes a well-designed app that allows you to view live streams. Also, Google will be offering extended sessions with developers near you. The company said it would offer more details soon.
Tickets for the two-day event are $900 with students and teachers paying $300. To register for the lottery, you will have to sign into Google+ and authorize the payment for your ticket via Google Wallet. Your credit card will not be run through unless you win the chance to purchase a ticket. Speaking of winning the lottery, Google I/O used to be known for the freebies that Google would give out, a process that ended last year. We recall fondly the old days when you had the choice of taking a free Motorola DROID or a free Nexus One.
source: Google via Engadget