you can make your own stamps now, www.photostamps.com, but I have not been able to get into the website for days. it seems to be a craze, and the site is overwhelmed.
I heard a piece on the Howie Carr show today referencing thesmokinggun.com.
Stamps they got approved: Monica's blue dress, Julius and Ethel Rosenberg, Ted Kazinsky (HS yearbook).
Stamps refused: Lee Harvey Oswald, Sammy "The Bull" Gravano.