Muqtada al-Sadr has announced that he is suspending the Mehdi Army until further notice or six months whichever comes first. Dog fighting perhaps?
Anyway, don't look for this to make a great deal of difference. As the past has shown, the Mookie can have great effect when he wants to ratchet up the violence, but has had little effect when he wants to abate it. The Mehdi Army is too decentralized with too many different agendas for him to fully control.
Still, it's better than him calling for attacks.