For everyone who hasn’t seen Boku before, this is a Microsoft Research developed game for the XBOX 360 (and presumably PC too) aimed at kids to teach them about programming via a entertaining and casual manner.
The last time this was shown was at TechFest in 2007 where it was still in pre-beta. Today at the last keynote of PDC 2008, Boku was shown again in a more advanced state. It looks several folds better and seemed to be a lot of fun. Check out this gallery of screenshots I took.