Hi,
I am part of a small startup
http://www.contextera.com that provides analytics for websites. We developed a software that will provide your website readers a functionality to share specific text with their social networks. This increases social traffic to your site.
We provide analytics around the content of your website and help you understand your readers much better.
We are giving this software for free. Integrating our software is very easy and I would request you to give it a try.