Launch outside the US

I know that this is probably an Apple secret, but is there any news about when this is likely to come to the UK? I have been wanting a feature like this for years and years. I even rented a server with a web front end that had my music on so that I could play it from work, but the iTunes solution is just great for working on my iPad and iPhone.

Am I right in thinking that the hold up is a legal one?