The official site has updated with a video of Matt Smith introducing the fourth episode of The Adventure Games. The new game, Shadows of the Vashta Nerada, is available in the UK on PC and Mac HERE. See Matt talk about the game and his lurve for sharks in the player above.
posted by BLOGTOR at 
You can play the game now :D
http://www.bbc.co.uk/doctorwho/dw/theadventuregames