Apple has announced that for the second year in a row -- the second year iPhone development has been on the program -- their annual World Wide Developers Conference (WWDC) has sold out.

Last year Apple used WWDC to unveil the iPhone 3G and MobileMe, and give second-looks at iPhone 2.0 and App Store. This year, smart money is on the next gen iPhone and iPhone 3.0 software, with wild-cards in the form of a low-end iPhone and iTablet. Steve Jobs is not scheduled to be back in time, but we'll continue to hold out hope for a surprise cameo appearance.

In related news, Apple is reminding developers that the deadline for Apple Design Award submission is May 4, so get those apps in soon!

Show off your hard work by submitting your iPhone OS or Mac OS X Leopard application to the Apple Design Awards. You can also demonstrate your ability to take advantage of early technologies by submitting a Mac OS X Snow Leopard or iPhone OS 3.0 beta application.