Interesting. So he'll have to physically be present in the CNMI? Presumably he'll fly London-Tokyo-Saipan, since this is just about the only way to get there without transiting the US (including Hawaii).
Yes, he'll be in court in Saipan on Wednesday morning to enter the plea. Apparently he's already left London, according to WikiLeaks twitter account and other reports. Don't think he's flying coach though : )
Ah, it's a private jet (Bombardier Global 6000), not commercial aviation. Then again, after all he's been through, it would hardly be fair to subject Assange to the horrors of cattle class on United.