The Yelp Kegmate may be the best iPad app ever created. The engineers over at Yelp have hooked up an iPad to a keg and created an app that monitors everything from liters drank to beer temperature.
The Yelp Kegmate truly is remarkable. It can keep track of drinkers via an RFID card and can even show you the current status of the keg. Check out the featured video to see the guys over at Yelp demoing the Yelp Kegmate.