UPDATE: Sold out in under two hours!
WWDC 2012 just announced and tickets are on sale at https://developer.apple.com/wwdc/
Two years ago, at $1600/ticket plus expenses, I wasn't sure if I would go, and tickets sold out in 8 days. Last year I determined ahead of time that I would go, and tickets sold out in one day! But I did indeed make it and got to see Steve Jobs one last time. Expect tickets to sell out today, so don't delay!
Sadly, Steve won't be there, and like last year, there's no guarantee the next iPhone will be introduced, but the material is valuable and the contact with Apple's engineers is priceless. And maybe an Apple TV that runs apps will be announced, so we can start writing for it?!