Apple has announced that its will unveil iCloud, its “upcoming cloud services offering,” during its traditional keynote address to open its Worldwide Developers Conference. According to the release, Apple CEO Steve Jobs and a team of Apple executives will make appearances during the keynote, which will feature the unveiling of iCloud, as well as Mac OS X Lion—the eighth major release of Mac OS X—and iOS 5, the latest version of the software that powers the iPhone, iPad, and iPod touch. Apple’s annual Worldwide Developers Conference will begin with the keynote address, to be held on Monday, June 6, at 10:00 a.m. Pacific Time.