Monopoly, greatest spy gadget of WWII?

So the Lost One was at work, being all, productive and such when the whistle blew for lunch,(figuratively). So the Lost breaks out his brown bag and begins perusing the web. This story was just awesome. (Also love the title, *Get Out of Jail Free*)

Turns out the British (Ultimate spy stuff, you know it's an MI product) used Monopoly games as spy kits, complete with real bank notes for the spending pretty cool.
Later.