During an entire weekend on July 2011, I participate in the first NYC hackathon. To illustrate what we did I'm quoting part of the Fast Company post about the Hackathon.
"One of the strongest efforts came from the raucuous group that won the "Best Use of Social" award, an international squad consisting of New York transplants from France, Colombia, China, India and the United Kingdom. The team members, who were all strangers until this weekend (yet another reason why the "Social" award was appropriate), developed a question and answer site, not unlike Stack Overflow or Quora, focused on issues facing New York City residents, visitors and businesses. Team member Alastair Coote, the group's U.K. native, said the site should single out what he referred to as "super-experts" on a variety of topics, ranging from restaurants in the Lower East Side to more practical concerns like how to get your kid into Kindergarten." - David Zax for Fast Company.
This was the presentation
For the final presentation, the Major of New York, Michael Bloomberg, visited the offices of General Assembly.
Here is the Official Press Release announcing the winners of the first NYC hackathon.
Press that we had: