What is the major iTunes announcement from Apple?

SAN FRANCISCO, USA: Apple Inc has signaled it will make a major announcement about iTunes on Tuesday, touching off speculation about everything from a Web-streaming music service to the long-awaited arrival of the Beatles catalog.

The Wall Street Journal reported on Monday that Apple is indeed finally bringing the music of the Fab Four to iTunes. EMI Group Ltd, the Beatles' record label, did not respond to a request for comment.

On Monday, Apple gave over the entire front page of its website to tease an announcement scheduled for 10 a.m. Eastern Standard Time Tuesday, but gave few decipherable clues.

"Tomorrow is just another day. That you'll never forget," the message read.

The notice triggered debate among analysts and bloggers about what Apple might announce for iTunes, the world's No. 1 music retailer. It has been rumored for months that Apple will launch a "cloud" -- or Web-based -- version of iTunes. Such a service would allow users to stream content over a network onto various devices.

An Apple spokesman declined to comment further. The company usually hosts a media event when it wants to unveil a major new product or service, but Tuesday's iTunes announcement will be made online, which only added to the mystery.