It's from Shirt.Woot.Com
I had this idea back at AC '07 when I thought it would be fun to panhandle on the streets of Pittsburgh. The other side was "Homeless Due to Global Warming. Please help. Dog Bless." I actually made quite a bit of money which was donated to the con charity. If there's any doubt as to who had the idea first, here's a pic from this year's DooDah Parade taken on Jan 18.
Yes, I ordered the shirt.