Business Analytics Forum hosted by the Business Analytics and Statistics Department at the University of Tennessee on April 20, 2015 will feature a talk on social media network analysis using the free and open NodeXL add-in for the popular Excel spreadsheet.
You can read more about the department and some of their initiatives here: http://issuu.com/utcba/docs/archwayswinter2014-15.finalpdf.forw/29?e=0