If your home is already full to bursting with Mario paraphernalia, you'll be delighted to learn that you can exchange your Club Nintendo Coins for downloadable games. Nintendo is featuring a rotating selection of WiiWare, Virtual Console, DSiWare, and eShop downloads offered on the North American Club Nintendo site.
Through January 10, your choices include Super Mario Kart (100 Coins), 3D Classics: Xevious (100 Coins), Fluidity (150 Coins), and Mario vs. Donkey Kong: Minis March Again (150 Coins). In a way, this is really cheap as it trades illusory fun money for games -- but in another way, it's outrageously expensive as said fun money is only acquired through the for-real purchase of multiple games.