This looks promising: Art Threat is a new web and print magazine about political art.

Art Threat is a journal of political art. We embrace art that confronts, interrogates, or even shrugs off the status quo. Art Threat looks for creativity that threatens the conventional wisdom with progressive ideas. By highlighting political artists and their work, and by challenging those who deny the political, Art Threat supports the creation of critical culture and strives to inspire people to act.

[via Drawn!]