I'd love to have some with a transparent background. Really, I was just playing around (well, I did make myself a golf shirt) and I kept playing around and suddenly I had a store. I don't imagine that the campaign will be getting rich off of this. Since I started posting the link around last night the shop's had a whopping four orders.
Honest, the EF Postal Service thing was an impulsive addition just before I walked out to go to work.