I wonder how you can keep the fees low enough to be attractive, while covering all the transaction fees from the various charges you'll be making behind the scenes. Not sure how much easier this is than each person doing their own Seamless order. Great job getting it together in a day, and great demo!

What's your competitive advantage if Seamless loosens their Group Ordering to be more consumer friendly? http://www.seamless.com/business/solutions/group-ordering/

Seems like it can be useful for the office setting. I would wonder where the future would be. Are there other avenues to explore other than lunch?

I would totally use this all the time with my coworkers. Nice work!

need to focus on niche groups initially to build mass/users (colleges, work, etc.)

Its an interesting concept, but I think you need to make design more original. Perhaps you gamify the design more or really build around a simple, fun voting app. You should check out Braintree Marketplace to create a mini marketplace to ease the payment flow from user to vendor.

strong concept and solves a problem.