Media6Degrees, a NYC-based provider of social media analytics for marketers, has raised a substantial $9 million first round led by U.S. Venture Partners. The company raised a $2 million convertible note this spring from Coriolis Ventures. It’s also raised “early stage” money from various angels. The company promises that through its algorithms, it can connect a brand’s customers with like-minded users across their social networks. It also claims that for large brand advertisers, its services can deliver can produce high rates of response and engagement. No doubt the idea of mining social data for advertising is a hot area. CEO and founder Joe Doran was previously at MSN up until this year. Release.