38 Degrees

38Degrees is an online petitions wedsite, which runs a variety of petitions on a broad spectrum of issues.
It seems to perhaps be a good example of an idea talk about in Give up Activism, where the author argues that people have become more interested in the being and activist than the actual issues they are acting against.

"The role of the 'activist' is a role we adopt just like that of policeman, parent or priest - a strange psychological form we use to define ourselves and our relation to others. "

It could of course be argued that a website such as 38 Degrees does not encourge defining onesself as an activist, but allows those less "active" to be so in a less comitted way, and is a tool for informing people about issues as well as encouraging action.