Social Media Networks With Real Focus

I decided to look beyond my usual social networking communities and found two very interesting to me…eons for “boomers” and Care2Make a Difference! for causes such as healthy and green living.  I am interested in learning more about how to create such communities, because there are segments of business professionals I know that are getting lost in the broader networks that need their own very focused community. I’d be interested in hearing from the experts in that field.  The new communities need business names that are engaging because they might be productive places to visit. Even the name of the CRM Salesforce.com’s Chatter sounds like a distraction to me.