Friedpope writes – “Target is handing out Wii GiftCards in anticipation of Nintendo’s release of this remarkable console. The cards are a bit thicker than your regular credit card and house some pretty nifty electronics. Pressing the button on the outside of the card turns on a ominous blue Wii glow that lasts about ten seconds. I’ll pop the case on this little thing and check out the internals. After that we’ll add a bit of functionality to the LEDs.” – Link.
Hacking guide to the Wii GiftCard