Yourstamps.biz. Have to say, the thought of having a Ferret stamp does appeal. Just send in your digital image and get back some stamps. $1.90 per sheet of between 6 to 30 stamps depending on size. Yeah of course they’re not legal stamps for posting, they’re more for posing. Geddit?
May I stick them on letters ? On the back side, as a sealing stamp, it is legal anywhere we know of to stick yourstamp.com stamps on letters. On the front side, check with your postal service… up to now we didn’t get any letters rejected even when stuck next to the correct postal stamps and delivered at the post office counter.
I live in Korea, and actually here you can order customized stamps (where you provide the image) that can be used to mail things. I think they’re a great idea and they’ve been available here for about six years now.
Even here in the U.S., you can get customized postage through CafePress.com and other sites.