Interpublic's Emerging Media Lab and SocialVibe have a patented micro payment system that offers incentives (e.g. charitable donations to favored causes like World Wildlife Fund and Stand Up to Cancer) "to the members of social networks who promote their brands on their personal pages". The public beta began in May 2008. Can you DIGG it?
Source: NetSquared, a project of TechSoup.org blogs
Carie Lewis, Internet Marketing Manager at the Humane Society, talks about how the humane society is able to raise funds, awareness, and activity through social networks. 