While there’s been no word of a new iPhone, Apple today announced that it will outline a complete overhaul of its major software platforms at its annual World Wide Developer Conference (WWDC), which is set to kick off Monday, June 6.

In a press release, Apple said that “CEO Steve Jobs and a team of Apple executives” will unveil the company’s next-generation desktop software (Lion), the next iteration of iOS (iOS 5), as well as iCloud, Apple’s upcoming cloud services offering.

The announcements have been rumored for months now, but this is the first official confirmation from Apple on any of the new offerings. The company did not elaborate on what kinds of new features and enhancements will be included in either iOS 5 or iCloud.

The company’s iCloud offering is widely believed to feature deep integration with Apple’s iTunes platform and store, allowing users to stream their music and videos from Apple’s cloud, as opposed to storing it on their device. Such a service has been expected ever since Apple acquired streaming music service Lala in late 2009.

No one knows what’s up Apple’s sleeve when it comes to iOS 5, but many expect a massive overhaul of the iPhone’s notification system, which many users bemoan as behind the times when compared to similar features on other platforms.

Apple unveiled the iPhone 4 at last year’s WWDC. This year’s conference will begin with a keynote on Monday, June 6, at 10 a.m. PST.