That's actually what Grassroutes does: http://grassroutes.us/

We created it as a generic, customizable widget for activists. Anyone could add talking points, a title, etc. We also have a way to browse through the widgets that other people have created. (Although since we made it at a hackathon this weekend, there's not much there.)

We made the SOPA widget and page AFTER the hackathon was done, because we realized it was an ideal use case.