In an unusual move by Apple they have announced the date and ticket sales ahead of time. This morning around 5:30 am PT I was waken to my monitoring app and greeted with this page.
So now we’ll have to see how fast those tickets sell out. Last year it was around 2 hours, I’m guessing between 30 minutes and 1 hour this year. Let’s hope apple handles the load a little better than google did for google I/O