I once saw a detailed analysis of skeuomorphic credit card input, and it turns out the general population is less likely to fail on a non-moving credit card input box, largely because of difficulties with entering the CVC code. This combines both the skeuomorphic nature of Skeuocard by Ken Keiter (http://kenkeiter.com/skeuocard/) with the simplicity of creditcardJS (creditcardjs.com). I love it!
