When registering on the website, there is a drop-down list of countries..Germany, Austria, Switzerland, France, The Netherlands, Italy.
I had a look on their "Versand und Zahlungsbedingungen" (terms of shipment and payment), and there they do not mention anything about orders from / shipping to outside Germany.
But putting an item in the shopping-basket and going to check-out (before deleting the item again), reveals you can indeed order from (these) 6 EU-countries (7 including Germany itself), as Erik suggested earlier.
Weird - and very annoying - they ship to The Netherlands, France, Italy and even to Switzerland (a non-E.U. country), but not to neighboring E.U-countries like Belgium and Luxemburg.
Not shipping (anymore) to other E.U.-states seems to become 'trendy'. A few weeks ago, I was notified by one of the major toy-store chains in Germany that they will no longer ship to Belgium. Not the first store or company (and certainly not only with regard to toys) to do so.
So, one (or another, some would say) of the positive aspects of belonging to the E.U. - being able to have goods sent from another member-state to your own country without actually having to drive or fly to it - seems to evaporate slowly but steadily.
Seems "free traffic of goods" more and more applies only to companies, and increasingly less to citizens wanting to acquire goods.
Ah, I didn't try to register... would only do that if actually ordering.
As would most people, I guess.