Warner Bros launched the official Harry Potter Movie website last Thursday in the UK. I think they've made a pretty good job of it, tho' it takes quite a long time to load (you can skip the intro, but it's worth a look) and there's virtually no information about the movie at all, apart from the official poster, but it's great fun for kids (that's my story), loads of interactive stuff, and presumably it will be added to regularly as the release date approaches.The chat forum is difficult IMO, but then I'm used to this one. Pity they didn't take some tips from Max.
The sorting hat has put me in Gryffindor.