With the exception of Cloning Clyde, all of these games normally cost $10 ($15 in the case of Bloodforge), so the savings are certainly substantial. Take note, however, that these bundles won't give you an extra copy of a game you already own.
TrueAchievements also spotted a Kinect Bundle listed on Xbox.com, which features Dragon's Lair, Wreckateer, Diabolical Pitch, Home Run Stars and Haunt. Strangely, it has no price and there doesn't appear to be any way to purchase it via Xbox.com or the Xbox 360 itself. There was an ad for the bundle in the Xbox 360 games section, though it appears to have been pulled. We've contacted Microsoft to see when or if the bundle will be available.