Update: Tickets appear to have sold out in less than 30 minutes. More here.

Google has opened registration for its annual Google I/O developer conference, this year extending the event to three days from its usual two.

Commencing on June 27 through to June 29, 2012 at Moscone Center West in San Francisco, a ticket for Google I/O will cost $900 for a general attendee and $300 for students and faculty of schools.

In a very Google-centric move, you will have sign up for a Google+ account (if you don’t have one already) and will have to pay with Google Wallet — streamlining the registration process for the company and ensuring that it doesn’t have to rely on third parties.

Screen Shot 2012 03 27 at 15.03.24 520x185 Google I/O 2012 registration opens, act quick before tickets sell out

Wondering if the event is for you? Google breaks down who will get the most from its I/O conference:

We recommend that web, mobile, and enterprise developers building applications in the cloud with Google and open web technologies attend Google I/O. Products and technologies to be featured at I/O include App Engine, Android, Google+, Google Chrome, HTML5, AJAX, Maps and Data APIs, Google TV, and more.

Google expects 5,500 people to attend this year’s event, and with the conference selling-out within an hour of the tickets going live in 2011, we recommend you be quick.

If you’re curious about Google I/O 2011 everything you need to know is here and you can be sure that we’ll be there this year to bring you all of the news again.