open deal format

Tippr Proposes "Open Deal Format", A Standard For The Group Buying Industry

<img src="http://tctechcrunch.files.wordpress.com/2010/11/odf.png" /> <a href="http://poweredbytippr.com/">Tippr</a>, which provides <a href="https://beta.techcrunch.com/2010/06/09/group-buying-site-