BBC Messageboards Bookmarklet

I've created a bookmarklet for use with the BBC's new messageboard system (which currently includes Points of View, 6 Music and 1xtra, although it'll eventually replace all their cranky old messageboards). The bookmarklet enables you to 'subscribe' and 'unsubscribe' to threads, which can then be tracked via your 'space' on one of the sites (see mine).