Katrin (Emerging) has grabbed a great study from TechNews on the use of computers by Studies: 90 Percent of Kids Use Computers (TechNews.com) unfortunately, the source link is dead.
According to KatrinPETA, for example does a decent job with their branded IM client, PETA TV, campaign materials (banners, psas, etc) but most (Campaigns) are sad.
The time is ripe for smart advocacy groups and campaigns to irregularly prepare campaigns that organize content and designing suitable chat scenarios for injecting advocacy debates into the “chatosphere”, helping chatters dominate a discussion and dive readers that results in actions by other chatters in the “room”. . This technique is already being used with success for commercial interest including “cutting edge” campaigns for the Austin Powers movies and many record promotions.
Chat campaigns are viral. Like most technology projects it was attempted three years ago at really high costs before users were ready. It is now cheaper and has a higher chance for success (Tech news and Katrin's observations) suggesting the time might be ripe to try again.