Every day that goes by, we hear about more card readers for iPhone and iPad. The latest one is from Eventbrite. The Door Card Reader turns your iPad into a ticketing terminal. It connects to your device via Apple’s 30 pin connector. It lets the indie event organizer take credit card payments on their iPads in an encrypted fashion. The companion app lets users monitor ticket sales and keep track of customer contact info. It lets you wirelessly print tickets and receipts too. The whole kit costs $10 to get started with.