I just entered a $20 Andrew Jackson bill into Where's George; a web-site
http://www.wheresgeorge.com/ that allows users to enter bills and hope that someone else will enter their bill at some point in its travels. They try not to count instances when money travels between family members.
My $20 Series 2004 bill EL82247090E had not been entered into Where's George before this. I picked it up from the automatic teller from a bank on CR466 on June 22, 2014. Lot's of co-incidences here.
Any other Where's George users on TOTV?
There's also a Canadian version called--wait for it-- Where's Willy.
http://www.whereswilly.com/ And a European counterpart.
http://en.eurobilltracker.com/