Today, people around the world are wearing red to show their solidarity with the people of Burma. How do I know? I didn't get it from NPR, the news, or even email. I heard it on Facebook.

There's a lot of activity related to Burma on Facebook right now. There are 379 groups, and 141 events, in a myriad of countries and languages. I belong to one of the groups and have been following their work to see how they are using Facebook to create some real social change.

In this kind of work, with so many organizations and people involved from so many places, there's little chance to pin any particular outcome on any particular actor. But, if we consider social change to be engaging the previously un-engaged -- getting people who didn't know Burma from Bali to learn and take some action -- then I think we can do a nice little investigation.