I realize you're the only person who is technically a "judge" however these are the top 3 projects from the hackathon in my opinion:
Overall great initiative and I'm glad to see a handful of developers went ahead and made something. Thought about entering the hackathon personally but realized that the time-frame to develop wasn't something I should strive for.
Either way, interesting hackathon. I'd suggest running one of these every month or every other month in order to stimulate the developer ecosystem.