Google I/O 2012 conference extended to three days due to developers wish for more time to attend sessions, visit Google partners in the Developer Sandbox, and meet 1:1 with the engineers behind Google’s developer platforms and APIs.
The event will take place in the same settlement Moscone Center, San Francisco but scheduled on a new date — June 27 – 29 2012. Google throws in a little surprise for next year notifying devs to “brush” their coding skills because something is coming in February (a new application process). This is all that Google wanted to reveal for now on their official blog.
source Google Developers G+ page