Co-founder of AOL Steve Case has invested an undisclosed sum in online wine marketplace Vinfolio.The funding comes from Case’s investment company Revolution – partners David Golden and Philippe Bourguignon will join the startup’s board of directors.The deal terms were not disclosed. Vinfolio, based in San Francisco, provides fine wine fans and collectors with technology to purchase and manage wine collections, and share their ratings and opinions with others. The company has raised capital in the past, most recently securing $4.5 million in