talked about earlier. I already had the original boxed set, but I decided I needed a hardback. The Doctor Who: Adventures in Time and Space - Limited Edition Rulebook is a pretty cool book, too. Unlike the other set, it has lots of pictures from and references to classic (you know, before 2005) episodes. It's also got some new material and some character stats from the Matt Smith era that I didn't have.
And I may be wrong, but I think the guy who started this RPGaDay thing was the main designer, so... bonus, or something.