Her experience at HackathonFull articleHacker News commentsNotable comment:
The best kind of hackathon project is to demonstrate a new technology. Facebook wouldn’t win a Hackathon, most social networks wouldn't, because technologically, they aren't that interesting. I am glad that you didn't spend much time business/revenue model or market research. I got it wrong the first time I joined a hackathon
I don't have any experience at this so maybe you guys can chime in?