They call this system the Beer Automated Dispensing and Security System (BADASS):
Adam, Kevin and I have been working on a secure kegerator project. We made a kegerator that uses an Arduino Duemilanove with an RFID reader for access control, a solenoid for controlling the tap and a flow meter for recording how much beer was dispensed. We are reusing our Makerspace keycards and fobs for access. The system is pretty simple and only has a few components. We’ve done a couple of iterations on it so far and are currently working on a custom-etched Arduino shield for the components. While the system currently uses a little Nokia 5110 screen from AdaFruit, we are also working on a version that uses an android phone for display, data logging and cloud-connected goodness.
The old, tired way of storing and dispensing beer relies on cans and refrigerators. This simply won’t do for today’s tech-savvy connoisseur.