My coauthor Jon Rivers is doing a GPUG Premium Member presentation on From a Nice-have to Must-have: Social Media for Microsoft Dynamics Community Members on March 6, 2012. Hit the link to register.
From a Nice-have to Must-have: Social Media for Microsoft Dynamics Community Members (Mar 6 12)
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.