Which Way Did He Go?

My wife received a $5 bill in change yesterday that bore the phrase "Currency Tracking Project" across one end of the bill and "See where I've been track where I go next" on both sides, stamped in red ink, along with a web address. I discovered upon going to wheresgeorge.com that the $5 bill had last been received as change at a Stop 'n' Shop in Worcester, Massachusetts on January 17, 2005! There are instructions on how to participate and begin tracking new bills. Just something I thought y'all would get a kick out of.