I also was amazed to find that one of my custom designs from a 'few' [o_o 2004!] years ago was in the Greenwood Dairy Queen's cake design cards!
This one:
http://lady-noremon.deviantart.com/art/cake2-8321343?q=1&qo=1
I was too lazy this year to make a design, so I just looked through their cards and :D [I will try to sneak a picture someday!]