Polywork, a business-focused social network in private beta that emphasizes the work people do over job titles, raises $13M Series A led by Andreessen Horowitz (Jack Kennedy/Silicon Republic)

 Jack Kennedy / Silicon Republic: Polywork, a business-focused social network in private beta that emphasizes the work people do over job titles, raises $13M Series A led by Andreessen Horowitz  —  Peter Johnston’s Polywork has...