Not incredibly difficult to figure out: Mutum Sigilum has been used to funnel Dwolla in and out of Japan for years now. Isn't it convinient that just a few weeks (or maybe not even a week?) from Coinlab lawsuit GOX gets this?
Coinlab agreement was precisely to handle US customers under a more legit frame. How convenient the Feds do this just now!
People will say I am a crazy conspiracy theorist. Think what you will. There is a smoking gun and it points out to Coinlab.
DISCLAIMER: I could give two shits about GOX, and CoinLab. I don't like either. What sucks is that this is going to put a serious dent on Bitcoin after these news are digested fully.