The iPhone maker has replaced its home page with a note that says, “Tomorrow is just another day. That you’ll never forget.” The page instructs people to check back at 7 a.m. Pacific Tuesday (10 a.m. EST) to learn more.

Apple Inc. is giving no specific details about the announcement. The company bought startup Lala.com last year. Lala lets people pay a small fee to stream music over the Internet instead of buying tracks for download. Some analysts believe Apple will eventually offer iPhone and other gadget users Web access to their iTunes libraries.

So far, Apple hasn’t made any similar features available for iTunes users. The company would need to have new deals in place with music labels first.