I know digi-stamps have been around for some time now but its only in the last couple of weeks that I've actually played with them and I have to say I do like how you can manipulate the designs to become different sizes or reverse images etc.
Here are 2 cards that I've made with them -
Very simple card with resized images
A very quick experiment using printable transparency sheets
The original image - Bathing in Gin while Bowling