Anonymous to Attack Iran?

Nidi62 writes: CNN has an article that Anonymous plans to use International Worker's Day as a basis to launch an attack on Iran, in an attempt to bring the revolutions spreading across the Middle East into Iran. Supposedly the attacks are supposed to start at 5am GMT Sunday. Other than that, the article is very short on substance. Is this really Anonymous, or could this actually be an attempt by Iran to make themselves look like the victim of another cyber attack?