Switching to Yammer save $1.5 million a year in Help Desk Calls.

[j-kid]

In 2011, Nationwide Insurance wanted to build and popularize an enterprise collaboration platform for the use of tens of thousands of its employees. But despite using an in-house collection of well-known collaboration tools at the time, including IBM Connections, Xerox DocuShare, and Atlassian Confluence, none of them was particularly catching on with Nationwide's diverse workforce.................................

More:

http://www.citeworld.com/social/22624/nationwide-yammer-sharepoint?page=0