Apple Inc CEO Steve Jobs will deliver the keynote at next week’s Worldwide Developers Conference. (BECK DIEFENBACH/REUTERS)

Jobs, who has been on medical leave since January, will join a team of executives to unveil OS X Lion, iOS 5, and iCloud, a cloud services offering, Apple said in a press release.

iCloud may mean the release of a remote iTunes service, particularly as recent reports have said Apple is nearing deals with music labels for cloud music rights. Finished deals with the major labels give Apple a distinct advantage over cloud music competitors Google and Amazon.

The release makes no mention of any hardware — such as the next-generation iPhone or MacBook Air — apparently confirming rumors that this summer’s announcements will be entirely software-related.

But you never know. Jobs has the tendency to keep “one more thing” up his sleeve.

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