Don't forget about domestic polish withdraws.
Those are subject to the same limit as SEPA withdrawals. Probably the same queue.
Not sure about that, they are domestic PLN transfers, has nothing todo with SEPA.
The EU Payment Service directive does not distinguish between domestic transfers and SEPA payments, as far as I can see. Opening an account in another country doesn't help either. The bank will probably allow it, but it will be illegal for MtGox to transfer more money to and from customers without a license, and breaking this law would be very unwise when they are applying for a license. It applies to all money transfers within the EU. Do domestic PLN transfers and SEPA transfers originate from different accounts, btw? Some banks allow multiple currencies in the same account.