For business purposes, the social graph creates an optimal referral network. As far as I know, no company has gotten into the national business of showing the myriad business networks - chambers of commerces, civic organizations like Lions club, even athletic leagues and churches - how to leverage social media for the business benefit of their members (it's all still done locally by some social media expert).
Enter my company, Domus Consulting Group. As part of our consulting practice, we've been leaders in educating real estate companies and agents on social media. Real estate professionals tend to be hubs of their business communities by virtue of the constant networking they do for business development.
From our work in real estate, we've developed a social network referral system that coaches business networks, teams and corporations how to leverage the critical art of the referral. Anybody interested in our methodology is invited to sign up for our free 3-week webinar sessions starting next week. We'll also be previewing a new media marketing paradigm for business development that I've alluded to in the article Web 2.5 Opportunity - Creating Media Hubs.