Though he's technically out on medical leave, Jobs is apparently able enough to do this, which is a great sign for his health (we hope).
We know he'll be introducing something called iCloud, a cloud service that many speculate will offer streaming music as well as other capacities.
iOS 5 for iPhone, iPad and Touch will likely get a big update, and the new operating system -- dubbed Lion -- for the Mac platform will get a modest makeover.
Many seem to be guessing that Apple is heading in a direction that ties all three offerings together -- a cloud service with Apple's desktop and mobile platforms.
There are numerous sites to catch blogging updates about the Apple announcement today at 1 pm. I'll try to do some live updating myself here. Stay tuned.
Photo of Steve Jobs at WWDC 2004 courtesy of Reuters