Yelp – which not long ago organized its first hackathon – replicated the event after six months. These are the winners:

Useful: Adam D., Evrhet M., Mark A., and Minh T. created a Q&A service that would let users ask and answer questions about a particular business.

Funny: Need to know when we’re launching our next product or how many users have signed up today? Then look no further than the Yelp Jumbo-Tron-O-Matic courtesy of Ben B., Jon M., Eskil O., Evan K., Daniel C., and James B.

Cool: At Yelp, we don’t mess around with our beer. To make sure we never run dry or get a bad pint, the geniuses on this team — John B., Gabe H., Alex D., Julien R., and Jeff M. — built the Kegbot. Controlled by an iPad app, you can tell how much beer is being emptied (and at what rate: cough, John), as well as leave a 5 star review for your brew.

The iPad-monitored brewing machine maybe not the cheapiest solution for your bar, but it’s definetly Cool. I wonder wether there are videos from the other two winners.

more on [YelpBlogPost]