I don't know if this is a repost or not, but at least in the West Covina, CA Best Buy, there was a 360 kiosk up and running. It was playing CoD2. I don't know if there were anything game demos as well because some asshat was playing it for literally a half hour even though there was a sign stating a 5 minute time limit. So, if the Walmarts have pulled them, perhaps you can find a 360 to try out at a BB.
Sorry if this is a repost.
Sorry if this is a repost.