KDDI Mobile - A Japanese MVNO in the US

This seems to have surprised a lot of people based on the ML chatter and blog static around right now. KDDI, Japan's #2 carrier behind DoCoMo, will launch an MVNO on Sprint's network in the US branded as KDDI Mobile. Now maybe they will start providing more global handsets in Japan besides the low-end Sanyo A5514SA. I think this shows that the MVNO movement has gotten serious and the US mobile market still holds opportunities.