From the demos shown on Channel 9, it seems the SDK comes with skeletal tracking. This would be big!! Edit: I just looked at the Skeletal viewer sample. Looks

From the demos shown on Channel 9, it seems the SDK comes with skeletal tracking. This would be big!! Edit: I just looked at the Skeletal viewer sample. Looks like they do have skeleton tracking in the SDK. Woot! Edit 2: They also have sound localization from the Kinect's microphones!! I'm not sure about others, but I I did not expect either features to be in the initial SDK. This might explain why it took them so long (they said it would be released in Spring). They seem to have gone all-out!