Wikipedia defines a social network service as a service that “…focuses on building online communities of people who share interests and/or activities, or who are interested in exploring the interests and activities of others. Most social network services are web based and provide a variety of ways for users to interact, such as e-mail and instant messaging services.”
In addition to web based social network services there is an innovative telephone based social network service, Senior Center Without Walls, which offers activities, conversation, and an assortment of classes and support groups to those who don’t travel to their neighborhood community senior center. You can participate from home through telephone conference calls. No special equipment is needed and the calls are completely free.
The promise of virtual reality conference calls via a platform like Second Life has not been widely adopted. Companies still use the basic telephone conference call to conduct important business.
Sometimes innovation requires a reexamination and reuse of existing products and services.