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
You can significantly accelerate this types of hacks with Unbounce. Just build a landing page in advance for "Lorem Ipsum" hack. Then, on an actual hackathon, you can launch a nice looking site for your idea in 30-60 minutes. Starting with Unbounce gives you time to find the first users and to work on the actual app experience.<p>Looking forward to try your app!
What happened after the deadline? Did you pitch it in front of everyone? Or did all the teams just get to experience the joy of building something with tight deadlines?