Update: The conference is already sold out. It took the company 90 days to sell out Google I/O 2009, 50 days to sell out Google/IO 2010, and just 59 minutes to sell out Google I/O 2011. The original story is below.

Google has opened up registration for its largest annual developer conference. Google I/O 2011 will take place on May 10 and May 11, 2011 at the Moscone Center in San Francisco, California. The event's goal is to bring together thousands of developers who want deep technical content focused on building the next generation of web, mobile, and enterprise applications with the search giant's offerings.

If you register anytime between today and April 16, you'll pay the Early Bird rate of $450. Otherwise, you'll have to shell out $550. Faculty and students can register at the discounted Academia rate of $150, which Google says will be allocated on a first-come, first-served basis. Before you dive in, you might want to check out the agenda, sessions, and FAQ.

"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," a Google spokesperson said in a statement. "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."