The problem, of course, is that with the current exchange rates, £129.99 is closer to $206 US and €149.99 is just under $200 US, making the European versions of the game considerably pricier. NCsoft explained to PC Gamer today that the reason behind this discrepancy is that "currency fluctuations, distribution costs, taxes and market conditions in addition to the cost of goods are all contributing factors when setting pricing. These vary dramatically between NA and EU and our pricing is competitive and adjusted accordingly." As the article notes, this might make sense if we assume that the CE of the game is manufactured in the U.S., but even with the extra shipping costs, it's a pretty hefty addition to an already sizeable price tag.
[Update: NCsoft points out that the EU pricing includes VAT taxes (20%), while the North American pricing is pre-tax.]