When I pre-ordered Elemental last night there was a very clear message that I'd be charged in my local currency ($Canadian) on the day the product "shipped". It even showed me what the current exchange rate was as of 9PM of the evening I placed my order AND warned me that some credit cards screw with the exchange rate or may insert additional fees.
If anything I'd say that Stardock have been more transparent about foreign currency exchange rates than any other online service I've used recently!! I was quite impressed actually.