Want to launch a site today? There are only two more days to enter the Will Code for Green contest, which will pick five winners of economy- or ecology-themed web applications that consumes Bing search (our Bing API profile).
Our Mashery Developer Outreach team co-organized and participated in over 50 hackathon events in 2011. Not yet 3 months in to 2012, we're already up to 25 and counting. All this exposure to hack events over the last 2 years has given us a lot of insight into what makes for a great hackathon. This insight also helps us -- and our Enterprise/Fortune 500 customers -- avoid the non-awesome ones.