off topic - diana sudyka

this is not an envelope, but the way diana sudyka uses stamps to build a larger picture is cooler-than-cool.

you can see more at her website.

http://www.dianasudyka.com/akpird4q495s2aicxdffehtkeubevz

click on the tiny images under the large one

then, if you have more time to surf, you can check out the rest of her work through the tabs at the top

tomorrow i will show a cool envelope from an exchange that uses this technique