Google just posted the I/O 2013 schedule and some surprises right off the bat. It looks like there is only 1 keynote this year but it will be a mind boggling 3 hours long according to the schedule (with break) from 9am-12 PT on May 15th.  There will also be satellite events happening around the world. We’re not seeing any Glass specific tracks scheduled but oops a commenter found a few:

There are a bunch of Glass specific sections. Just click the button at the bottom of each day that says “Show other Tracks”. There is even a session specifically on how to hack and get root on Glass. Should be a fun IO.