The title above links to a Wall Street Journal review of Microsoft's new Zune player and music store by Walt Mossberg. What struck me was that store customers must pre-pay, buying points which they then in turn use to purchase songs. And songs cost 79 points, which is equivalent to 99 cents. Exactly why did Microsoft choose an "exchange rate" (99/79) that produces a fraction that doesn't repeat until the 14th decimal place? OK, it's true that 79/99 repeats at the third decimal place. Will Microsoft round the number of points up to the nearest point when customers invariably pre-pay with a whole number of dollars? I assume that this is a mechanism for them to decouple song pricing from their payment system; maybe they think that people will view songs as being cheaper than they are because the number of points is less than the number of cents? I would suggest instead that they use an exchange rate similar to what used to exist between the dollar and the Italian Lira: seeing all those zeros (with, say, 7900 points for a song) will make it seem much more like paying with "play money".
Too bad that they need to get the customer to deposit real money to start.