Tim Bray has a post entitled Whiskey-Bar Economics where he writes

As an added bonus, in the comments someone has posted a pointer to this, which (if even moderately accurate) is pretty astounding.

I'm not sure what is pretty astounding about CostOfWar.com. The Javascript on the site seems pretty basic, the core concept behind the site is opportunity cost which is explained in freshman economics class of the average college or university and the numbers from the site actually seem to be lowballed considering all the headlines I seem to read every month about the Bush administration requesting another couple of billion for the Iraq effort. For example, according to a USA Today article entitled Bush to request $25 billion for Iraq war costs, the US congress had already approved $163 billion for the War on Iraq when the another request for $25 billion showed up. Yet at the current time CostOfWar.com, claims that the war has cost $116 billion.

On the other hand, I think this is pretty astounding.