This year’s five-day WWDC event will offer a new track dedicated to the iPhone, offering developers with in-depth sessions and hands-on labs to fully explore the capabilities of the iPhone 2.0 software, including the iPhone SDK and the App Store.  The track is geared for applications than can be deployed to the iPhone and iPod touch.

The iPhone track will also enable mobile developers to work with Apple engineers to create applications: Multi-Touch, animation technology, Core OS, Core Services, Media and Cocoa Touch technologies, built-in three axis accelerometer and geographical location technology all feature in the session range.

Additionally, this year's Mac track is has been structured to provide new and existing Mac OS X developers the technical foundation and techniques needed to develop world-class OS X Leopard applications.  Sessions will be geared towards every level of the Mac operating system including:

The combined iPhone, Mac OS X and IT tracks will offer over 150 information-rich sessions and labs where Apple engineers will go in-depth on the innovative technologies that power the iPhone operating system, Mac OS X, and Mac OS X Server.

You can learn more at Apple's WWDC page and WWDC FAQ page.

The rapidly expanding Mac user and iPhone user base will make this the largest WWDC in Apple's history.  Thanks to switchers and the popularity of the iPhone, expect a record number of developers to attend the event eager to release new applications for Mac OS X and the iPhone.