Social Networking — Facebook and Linked-in are two of the most popular on-line social networks, but there are now millions of others catering to all ages and a myriad of interests. A look at the growing appeal of on-line social networks and their value to members in the profit and not-for-profit worlds.

The guests were: Gina Bianchini, co-founder, Ning; Andy Carvin, senior product manager, NPR Community, NPR Digital Media; Josh Bernoff, vp, principal analyst, Forrester Research; Manuel Hernandez, president,Diabetes Hand Foundation www.tudiabetes.com, and Amy Worley, Director of Digital Marketing, H&R Block, Digital Tax Solutions.

I did chuckle when Andy Carvin talked about using Twitter to announce that a guest for an NPR program had cancelled and ask for suggestions for a replacement. During CIL 2007, it was the obverse. The Tuesday morning keynote speaker couldn’t make it, so Andy filled in — and Twittered the experience. On  today’s radio show, he also talked about how NPR is using Twitter to broadcast news. Very creative, NPR!