I haven't dealt with this webshop.Shipping costs were clear and I got put off by the blurb they used to have about not selling to countries where the product already had dealers, that bit isn't on their website now but in the meantime i shopped elsewhere and found better prices. Really, buying dynamo bits from the US isn't cheap, nor is the postage. Lots of European websites sell dynamos and dyno wheelsets, have been used by BNAers. Check out Rose Versand, Bike24, Bike-Discount.de, Starbike before you commit to the US.
I generally build my own wheels, makes postage a bit easier when buying dynamo bits. Also gives more options on hubs. The Sanyo hubs from PWC are similar in price to what you can get for most Shimano or SRAM, maybe not as smooth running as the newer Shimano models (like the XT).
Edit: Aushiker just posted something about prices from XXCycle in France
http://www.xxcycle.com/wheel-hub-dynamo,en.php