Kaufman Bros. analyst Shaw Wu in a note to clients today listed a number of expected and potential announcements from Apple at its World Wide Developers Conference June 7, which included the possibility of a Web-based version of iTunes called iTunes.com.

The potential for a Web-based version of iTunes has been discussed for some time, ever since Apple bought music streaming service Lala last year. Expectations that Apple will finally unveil it’s plans for Lala next month increased after it announced that it would shut down the Lala service at the end of May.

Label sources confirm that Apple has approached them about plans for some sort of cloud-based music streaming service that would let people who buy iTunes tracks stream them to any device. The music industry feels that use case would require new licenses, and negotiations around that point are very preliminary. So preliminary that it’s not clear whether they are in any shape to be made public by Steve Jobs’ June 7 WWDC keynote.

But that doesn’t mean there’s no chance that an iTunes.com-related announcement will happen. Here are the scenarios:

- Jobs announces plans for iTunes.com, but not its availability. This is unlikely as Apple generally likes to announce things that are available either the day of the keynote or available at a specific date.

- Jobs introduces elements of iTunes.com that don’t include streaming music to any device. Simply allowing users to buy iTunes tracks from a Web-based store rather than forcing them to download the iTunes client would be a big step. Then he could mention Apple’s intention to add streaming in the future once the licensing deals are sorted out. That could put some public pressure on the labels to make things happen.

- Jobs introduces and launches the whole iTunes.com package. It’s not fully clear whether the labels even have the right to ask for increased licensing fees for the ability to let users stream songs they’ve purchased to any device. Apple may be tired of the back-and-forth and could simply launch the service without new deals and see how the labels respond. This is also very unlikely because for all the drama reported between Apple and the music industry, the relationship overall is generally solid.