Now that sucks. Half a year ago I could buy games for USD. At that time 1 USD was worth 5 norwegian kroner. now I have to pay the same amount of euro as I before paid USD, only now one euro is worth 9,6 kr (USD is currently at about 7). Not happening
After what seems like an eternity of currency conversion, hidden sales tax (WHY?!) and obscure over-pricing, Valve have now adapted the Steam Store to show & charge in the native currency of the account (on the website store anyway).
See the official forum post here to get the long & short of it, then simply click here, login (Steam now seems to support purchases outside of the program) and get buying in real money, rather than that economy-destroying fake money.
RPS have done a little analysis and price comparison, including some obvious failings in the system and surprising bargains.