I did this in December on a batch of ten. With a coupon and shipping from Cafepress, the stickers came out to two bucks a piece. I distributed the last of them at the Lancaster show breakfast. I mailed a number to board members, forgot to include the price of a stamp in my initial pricing, but most folks threw in the extra $.46. It is a little bit of work but no more taxing than a fly swap.
http://www.cafepress.com/+paflyfish+stickers
Dunno if there maybe some available at the newbie jam too? I might throw in one of my spare stickers for the first person that introduces themselves as belonging to PAFF 🙂