How Nimble.com Can Manage Your Social Networks

Nimble offers a way to unify and better engage your social network contacts and track your customers and prospects. We tested version 2.0 in February and found lots of great enhancements, including support for Google Plus and Facebook business pages and integrations with leading SMB marketing tools.

There is a free plan and a paid corporate one for $15 per user per month.
http://nimble.com