I'm a student at the University of Michigan and I just used this in Ann Arbor. Students celebrated St. Patrick's Day today and Instahood did an amazing job collating everyone's pictures from the festivities.

I agree with jgh that the interface isn't the best, but that's something that can be fixed. The underlying concept of seeing everyone's Instagram pictures in your immediate vicinity is extremely appealing to me. Great work and I hope you keep refining this!