LOL that's wicked. Nice job, man. I too admire the serial numbers.
As for the back, how about the most distrubing quote from the watchtower you can find, complete with reference so they can look it up if they care to.
Just yesterday I realized the best way to combat the JWs as a group is by publishing counter-information such as this funny money. The specific idea I had was to publish a parody of the Awake! magazine containing amusing, yet scathing articles about the JWs, in the same condescending tone of the magazine. I thought of calling it "Asleep!".
If I agreed to do the editorial work, graphics and page layout, are there any amongst us who would spend some of their time contributing articles?