I saw this is last week's Economist; the good folks at MR tracked it down online. It's a map of the United States, only instead of the state's names they place the country in the world which has the economy closest in overall size.
Even more fun-- the countries of the world were arranged like this, how would things shake out? Switzerland next to Libya creates an interesting dynamic, as does Australia and Yemen.
There's something bizarrely satisfying about West Virginia as Iraq.