While I think groupon can be very useful for some business model, especially ones where you can control bookings and cross/up sell. I think groupon is going to be hurt when the economy becomes bullish because fewer businesses will be desperate for sales. I think livingsocial has a better longterm future because of its better terms for businesses.

I don't know of a specific site to find a partner, but just become active on sites like this and make new connections. Should be plenty of talent in DC as well with companies like livingsocial and blackboard. Trust me do what you enjoy and things will work out. Looks like you have a very bright future ahead.