StackSocial, the venture-backed startup focused on a service that ties e-commerce with online publishers, said over the weekend that it has "completely overhauled" its site, focused on mobile-ready access and connections to social sites like Facebook. The startup--backed by 500 Startups, Siemer Ventures, EchoVC Partners, and Amplify LA--is one of the first firms out of Los Angeles-based accelerator Amplify. StackSocial said "StackSocial 2.0" has been designed from the ground up to work on iOS, tablets, smartphones, and other mobile devices, using HTML5 and CSS3.