A simple social experiment, IGotAnEnvelope.com, demonstrates that not all social-networking needs to begin on-line and how to successfully integrate traditional marketing with new media.

“Igotanenvelope is a continuous art project where people leave empty self-addressed stamped envelopes in public places to be picked up and filled by others, who then send them back.”

Once an envelope is returned the contents are displayed at IGotAnEnvelope.com. So what’s the point? …