Along with announcements about Lion (the next incarnation of OSX) and iOS 5, Apple will announce details of their upcoming cloud services offering on June 6th during the WWDC Keynote. Speculation is rampant about what iCloud means, but almost assured is some form of cloud music service to compete with the recent Google and Amazon products. Other possibilities include a more robust syncing service (a la dropbox), network-based wireless syncing of your iOS devices, and a potential new API service for app developers to use for data synchronization between Apple devices.
We’ll see what Apple has up it’s sleeves in less than a week!