The just-launched project has already raised over $14,000 on Kickstarter, out of its $50,000 minimum, so it’s safe to say it will hit its goal in the next 38 days. $18 will reserve your Chargecard in black or brushed metal, or for an extra $12 they’ll put a bird on it for you. (Really.)
So far, the Chargecard is only available for 30-pin compatible iDevices. The Kickstarter page mentions plans to develop Chargecards compatible with micro-USB and whatever port Apple settles on for its next iPhone, but those are available yet, so unless you’re committed to your current iDevice you may want to hold off on pledging.
If you're interested, go check out the Chargecard on Kickstarter.