In what could be a complete turn over in the social discount arena, Facebook is launching their Deals program in five cities overnight.  This will be combined with check-ins which can get you bigger discounts and a virtual currency.  You check in with more people, you get a bigger discount.  For businesses it will be better than the current Groupon and Living Social because they will not have to pay for the discounts to Facebook and Facebook will be able to provide marketing information.  Of course there are concerns here about a new currency and more information sharing but seems to be the price paid for more social and mobile services.   More in the attached article from ReadWriteWeb.