UPDATE BELOW. Reports are coming in that payment service Dwolla has been legally blocked from servicing Mt. Gox transactions. The Bitcointalk.org forum admin has supplied an image of his notice, posted below. The notice states that:
Due to recent court orders received from the Department of Homeland Security and U.S. District Court for the District of Maryland, Dwolla is no longer legally able to service Mutum Sigillum LLC’s [Mt. Gox] account.
UPDATE! I have received confirmation from Dwolla:
Thank you for your email. Yes, this is the case.
As of 12:13 PM on 5/14/2013, the U.S. District Court for the District of Maryland issued a “Seizure Warrant” for the funds associated with Mutum Sigillium’s Dwolla account (a.k.a. Mt. Gox). In light of the court order, procured by the Department of Homeland Security, Dwolla has ceased all account activities associated with Dwolla services for Mutum Sigillum.