This week's Deal of the Week is Ninja Gaiden II Mission Mode, which is discounted by 33%. Instead of the usual 800 MS points, it will only cost gold members 560 points this week.
Last week's deal, Braid, is no longer available. If you are an Xbox Live silver subscriber you will not get the discount.
I believe this DLC adds 250 achievement points to the original 1000 gamer score.