Just a rumor, you might have to give Gamestop your credit card number as a deposit when trying out the Wii just in case you break something or hurt someone. Just a rumor, but still, with the Wii coming out with a new type of gameplay, new risks will pop up and this rumor has a high chance of happening. If it does happen, looks like i won't be going to gamestop to try it out.
Also, Gamestop will be the only store recieving Wii Kiosks from Nintendo for selling the most Nintendo consoles. Sweet! But there will be stores making their own Kiosks.