The nerds at Yelp who revolutionized the way 20-something girls could give their opinions on stuff and actually have it matter in the slightest, have turned their attention to beer. Namely, making an iPad and a keg work together.

The shouting Yelper explains now the iPad/Kegbot contraption works. The iPad displays beer information—live, while it's flowing—and even tracks who's drinking from the keg, plus how much they've taken. You can rate the beer and even see a leaderboard.

And if you want to do it yourself, you can grab the source code here. [Yelp via Lifehacker]