This week Zoho [1] announced a new social tool for its growing business suite that lets users create internally- or externally-facing communities. You could use this, for instance to build a customer support forum, conduct customer research or create a place for internal teams to share ideas. See a video tour of Zoho Discussions below. Press Release [2]
Links:
[1] http://www.zoho.com/
[2] http://www.fiercecio.com/press-releases/zoho-launches-zoho-discussions