I believe the book is out imminently, if not already, in the US as well — based on the Amazon.com page, where you can also order it.
I hope the absence of recent posts on this site hasn't created the mistaken impression that I've been slacking. I've been using the book blog as my main outlet recently. All my posts there are linked from the sidebar on the home page. If you're using an RSS reader, I recommend my 'compilation' feed, which brings together posts from this site, my book blog and my furl bookmarks related to digital music and digital culture. (This feed uses Yahoo Pipes. It seemed a little unreliable to me at first, but has now settled down: let me know if you have any problems with it.)