playstation vita tv region locked?

not long ago Sony launched the US version of vita TV (playstation TV). Not much info in the net but i was wondering if the Hong Kong / japan vita TV (asian region) was able to log in PSN US account since the US has launched the console. before the US launch i heard you cannot log in PSN US with japan region console. Any idea guys?

i received my hk version (asia) vita TV today and loved it. it's white in color and able to log in into US PSN account. Just simply enjoyable in huge screen.