Avaaz: clicktivist heroes or Soros wolf in woolly disguise?

Avaaz, with a membership topping 40 million, is one of the princes of the clicktivist phenomenon. These virtual warriors for justice are everywhere and have been for a while, and once you somehow arrive on their mailing list you are going to be bombarded with their earnest updates until you find the magic unsubscribe button that sets you free. But are they all that they seem?