With so many US soldiers overseas, their loved ones are using the placement of stamps on the envelopes to communicate messages back and forth. This is something that has always existed with stamps, but is not so common now that personal letters are going to email. However, war means more handwritten letters, and more messaging through stamps.
One of the more interesting bits is the fact that the messages aren't always clear to the recipients. One of the people quoted said,
"I think it took several letters before my girlfriend realized that the upside-down stamp wasn't a mistake."
Fun stuff. Oh yes, and PS (blatant trolling for information) I would love any info anyone has on stamps (or images on stamps) and their meaning.