Update 11:30am PST: Google I/O 2011 has sold out.

(Cross-posted from The Official Google Blog.)

We’ve been counting down the days until Google I/O 2011 and hope that you have been, too. With 91 days, 22 hours and 45 minutes to go, we’re excited to announce that registration is now open at www.google.com/io. Our largest annual developer conference will take place on May 10-11, 2011 at the Moscone Center in San Francisco, Calif.

The focus of I/O 2011 will be all about the cloud, and feature the latest Google products and technologies including Android, Google Chrome, App Engine, Google Web Toolkit and Google APIs. There will be many opportunities to meet members of Google’s engineering teams and take deep dives into the technologies with more than 100 technical sessions, roundtables and more. The Developer Sandbox, which we introduced at I/O 2009, will be back, featuring developers from more than 100 companies to demo their apps, share their experiences and exchange ideas.

If you liked our HTML5 countdown, stay tuned for more surprises. We’ll keep you posted on the latest developments for Google I/O 2011 at the website, on Twitter (@Googleio) and Google Buzz. Get your tickets early—last year we sold out in record time!

Registration opens with an Early Bird rate of $450, which applies through April 16 ($550 after April 16). Faculty and students can register at the discounted Academia rate of $150, which will be allocated on a first-come, first-served basis.

Learn more and register today at www.google.com/io.

We look forward to seeing you in San Francisco!