MSNBC Interactive News LLC has acquired Seattle-based Newsvine Inc., a site that focuses on social media and participatory news space. Newsvine's social media offerings include contributor columns, user profiles, group commenting, and conversation tracking. Msnbc.com will have access to a full suite of community product features that can be leveraged to enhance msnbc.com's existing offerings. The combined assets and expertise will deliver tools intended to offer users a richer news experience and enable advertisers to interact with consumers in new ways. Newsvine's employees will continue to be located in their downtown Seattle offices. Mike Davidson will retain the title of CEO and report to Charlie Tillinghast.