Came across this today. Those of us (re)implementing billing may find this interesting.
It’s called “Skeuocard”, and it’s a different take on the credit card info input form. It makes the input fields appears as they appear on the card, and it does AJAXy value-added things behind the scenes.
It’s on GitHub under an MIT license. The project URL is http://kenkeiter.com/skeuocard/