I’m happy to report that by joining a LinkedIn group I get notices about new discussions. One very lively discussion was in answer to a topic posted by J. Paul Duplantis:

Looking for case studies on the successful use of social media to grow a business. Looking to dedicate a resource page to successful case studies of businesses using social media. If you know of solid examples I would appreciate a link. Let me know if you want the final list for your own use as well.

Many folks replied and offered links to lists. Here is one great example. Check it out!