I have found this article today on VerticalReponse's blog. I felt that it looked like a way to use the groupon's deal idea but for twitter. In fact, the way I understood it, the method was to ask people to tweet about your product. If a certain number of re-tweets were made, the price of the product would be lowered. What do you think about it?
if that is integrated into the groupon for qualifying the buyer of the coupon, that would work fine. the breaking point of the groupon deal , has been that there was no way to track the buyers, until now. with a little bit of thinking on your part, see what ideas you can come up with that may integrate the groupon deal with Facebook, Twitter,, Myspace, etc and adds the additional benefit of building a list along with the coupons. Pm me for more details if you wish.