Apple's Worldwide Developers Conference (WWDC) kicks off today at the San Jose Convention Center.

Speculation over event announcements range from multiprocessing Macs to Apple-branded PDAs. However, many industry experts are predicting no hardware announcements, but plenty of new Mac OS X features, and possibly a preview release.

An announcement regarding WebObjects is also anticipated. As Steve Jobs said in a recent annual shareholders meeting: "We are 100 per cent committed to WebObjects, and we've got some plans to turbocharge it."

The conference opens with a keynote from Steve Jobs and chief software engineer Avie Tevanian. It runs until May 19, and includes tracks on Mac OS, Hardware, Networking and Security, Digital Media and Tools.

There's also an Entrepreneurial Bootcamp, the Apple Design Awards, AppleMaster presentations, and an exhibition area.