Friendster et. al.

An interesting service where ppl can meet one another via their friends. I can see a great deal of commercial use of this technology in corporations where this idea may be used to bridge corporate barriers and better interaction between individual for the benefit of the organization.

Mayber I spoke too soon orgnet.com seems to be built around this concept.

Ben Discoe describes his amazing work on visualizing his pose at Friendster. His 'future steps' section has a great deal of interesting content - namely substitute for Friendster, visualization tools etc.