yammer
Yammer gets big money Paid Members Public
Yammer, which creates something akin to an internal Twitter for businesses, is raising big money [http://www.cmswire.com/cms/social-business/yammer-announces-completion-of-big-funding-round-014693.php] : > In the four years since its inception, Yammer has been implemented by over 85% of the Fortune 500. In 2011 alone, the company tripled sales, employees
