I suppose, seeing as I go on about Doctor Who all the time on this blog, I should jump to conclusions about the new star actor without knowing anything about him or the future plans for the series. I've seen Matt Smith in The Ruby In The Smoke and The Shadow In The North - or at least, I must have seen him in those, since I watched them, and thought they were quite good. And Jim is a great character in the books, so it's a bit disturbing that I don't remember a single thing about Matt Smith's performance. Still, maybe he'll be a better match for the Doctor. There's nothing wrong with having a very young actor playing the part (although he'll be the first younger-than-me Doctor, which is alarming), but they'll need a hairstyle and costume that are timeless rather than trendy for it to work.
That's enough anticipation, though, we're not going to see him until 2010, and by that point we'll all be living on the moon and driving space cars.