ChompOn publishers can embed group buying and "flash sales" into their existing sites through a set of customizable widgets or by white-labeling the service. If you're aiming to dethrone Groupon, ChompOn is really an elegant and robust platform that will set you on the right course.
The service features social widgets (enabling users of your service to like you on Facebook and share deals on Twitter) with tipping points which encourage users to spread the word in order to hit the minimum, analytics (performance and conversion), daily deal email and certificate automation, secure payments, branded iPhone apps and more.