The agenda covers Mac OS X and iPhone OS (including iPad-specific sessions), with tracks on application frameworks, core OS, developer tools, graphics and media, and Internet and web.
"This year's WWDC offers developers in-depth sessions and hands-on working labs to learn more about iPhone OS 4, the world's most advanced mobile operating system," said Scott Forstall, Apple's senior vice president of iPhone software.
"WDC provides a unique opportunity for developers to work side-by-side with Apple engineers and interface designers to make their iPhone and iPad apps even better," he added.
WWDC registration costs $US1599.
Interestingly, this year's Apple Design Awards - presented at the conference - are only open to iPhone and iPad apps. In the past, Mac OS X products have also been eligible.
But what about the iPhone? Please read on.
What appeared to be a sample of the so-called iPhone 4G was purportedly found in a Silicon Valley bar and ended up in the hands of Gizmodo, which reported it had a front-facing camera, an improved main camera (with flash), micro SIM, "seemingly higher resolution" display, and a secondary microphone for noise cancellation.
The styling takes cues from the current iPhone and iMac models.
We'll find out in a little over five weeks whether this really was the next iPhone. But one thing's practically certain - Gizmodo spilling the beans won't result in less media coverage of the new iPhone.