This was linked to on LifeHacker today:
http://www.gautamnarula.com/how-to-get-good-at-chess-fast/ Much of it is aimed at strong adult players, but may be of interest. I am looking at the Chess Tactics for Beginners CD ROM for DS. I'm not sure why, but he sort of lost interest in Fritz and Chesster in the middle of disc 2.
Bostonian, DS and I really enjoyed playing through the world championship games and watching some of the coverage.
DS was able to complete all the quizzes on the Kid Chess evaluator (he struggled a bit with some of the 4-star ones but still got the certificate). They did not give him a rating, though, AFAIK. Oh, except he did not do the ones about building a house or a spaceship because he didn't know what that was (some strategy the site teaches, I assume).