So, for the record: I believe that in the official rubber duck codes and rules of conduct in the section under declarations and proclamations there is a specific language that dictates that when one should happen to announce the introduction of new rubber duck themed body art, one is required both by law and by social pressures to produce visual confirmation and, in fact, detailed documentation of said themed body art. (I believe it's Charter IX, section XIV, paragraph 3.A).
In other words: Where are the pictures man? We want to see the tattoo! =) (To quote DuckLips: Pix or it didn't happen.)
Also, I'm aware of at least one other person. I don't know if she's on the forum here but a while ago Adrienne sent us a picture of her rubber duck tattoo: http://www.rubaduck.com/postcards-roger-rubber-duck.htm
(about 2/3 down the page).