Venmo recently updated their mobile wallet app, which includes card.io. You can read about it here, and here's a screenshot:
TaskRabbit announced their slick new iPhone app. According to TechCrunch:
"Seriously, if you’re a TaskRabbit user you should try it out, because it’s pretty impressive. Too lazy to type in your credit card number? You can take advantage of your iPhone camera and take picture of your credit card to pay. Yeah."
Check out Venmo and TaskRabbit, and let us know if you're looking to integrate card.io into your app!