According to news published at todoUMPC.com they contacted Kohjinsha in Japan asking to distribute the UMPC models in Europe and this is what they got:
" It is KOHJINSHA service center.
Our company becomes a response only of Japan.
Please continue your favors toward understanding above."
Even me, an expert in "broken English" had problems trying to understand what this means. But... after reading it 10 times it seems to me that means: We are only selling it in Japan. So probably the only option for many users that want to buy this device is going to be Dynamism.com