Apple CEO Steve Jobs and a team of Apple executives will kick off the company’s annual Worldwide Developers Conference (WWDC) with a keynote address on Monday, June 6 at 10:00 a.m. At the keynote, Apple will unveil its next generation software - Lion, the eighth major release of Mac OS X; iOS 5, the next version of Apple’s advanced mobile operating system which powers the iPad, iPhone and iPod touch; and iCloud, Apple’s upcoming cloud services offering. It is certainly out of the ordinary for Apple to pre-announce exactly what the keynote will be about. As John Gruber says, it is probably due to Apple making sure there are no expectations that there will be any hardware. Gruber is usually correct on these things.