WOW! I just saw this "make it at home stamp kit" being
demonstrated. It's a really cool product that turns any image or
photo into a polymer stamp, without carving. It's really pretty
expensive, and I can't really see using it for letterboxing, but it's
fun to watch. I'd still much rather hand carve my own stamps, but I
thought I'd share the video if anyone was interested in seeing
it. Maybe some people that "can't carve" would be interested in this
for making custom stamps, rather than store-bought.

http://crafttvweekly.com The video should be on the main page, but
if not search for Tricia Morris and find the video titled "stamp your art out".

Bali