It might have taken a little bit longer than expected but Apple finally released iTunes Match in the U.S earlier this week, although still in Beta, but still a public release. As far as the UK goes, it looks like we will have to wait another few months at least.
A recent Cnet report hints at the UK being the next progression for iTunes Match, but that it will not happen until early 2012 at the earliest, given the delay of the initial launch as well. At the iPhone 4S event Apple did say that iTunes Match would become available for other areas before the end of the year as well, but now it looks like those dates might get pushed back until 2012.
iTunes Match is the service that allows you to have all your music and media files stored in the iCloud, and which will automatically upgrade your current music files to the highest iTunes quality. It is believed that the main issue for an international launch so far has been getting the licensing agreements in place with the music labels.