There is another interesting thing with Amazon selling Kindles to European countries (outside those who have there own websites like uk or de). They cannot be bought from either amazon.co.uk or amazon.de, only from amazon.com and they are shipped from the US. Logistically it doesn't make sense because of higher shipping costs, longer delivery, increased price due to customs tax and complicated paperwork. It becomes especially complicated when dealing with warranty service that requires sending broken Kindle back to the US.
Why not ship those Kindles from DE or UK? I don't think that it is just a random choice, more likely it is a clever policy.