According to an LA Times article, the Whitehouse is using the power of social media to start a “reality check” offensive to stop the spread of health insurance reform rumors:
The White House blasted links to the package out to more than 300,000 fans on Facebook and more than 900,000 on Twitter today. It also sent an e-mail acknowledging “scare tactics” being used to bash the programs. A few hours later, users of the social news site Digg voted Reality Check to the site’s homepage. That potentially exposes Reality Check to millions of eyeballs.
See also the Whitehouse’s blog post on the topic.