The closure was due to Karpeles' lack of having a MT / MSB license in the state which he set up the Dwolla / Sigllium* LLC. The warrant PDF stated he answered "No" to several MT / MSB questions. Just an agent had used it enough to connect the dots and have the power to actually have a judge issue some papers.
I don't think it had anything to do with Satoshi Dice or the Coinlab stuff.
Oh, speculation thread. Yeah I'll say this + Coinlab is going to signficantly screw them over or close Gox eventually. Unless they can meet the required paperwork and there's no jail time or however it works out.
Nah, MtGox can't be closed by the US, way out of the US jurisdiction.
The only thing that can happen is that MtGox will lose the US market at worse, but I can imagine at least two ways to bypass any ruling against Mutum Sigillum and be right back on track with Dwolla again.
"Bypass any ruling against Mutum Sigillum"? How does that work?
They can't "close" it in the sense of say, a suspended corporation. But this really boils down to how well Mt Gox is managed in the case that more accounts are targeted. The feds have jurisdiction over US accounts and can obtain jurisdiction over many foreign accounts (e.g. in Japan). Hence, liquidity becomes king. IMO, this isn't about whether the feds can close Gox, it's about how badly it can bleed it from the inside out. If they continue to serve the US market in the face of, say, an increasingly threatening situation from the US government, they better get smart about where they hold funds and how they batch cashouts.