Darren Di Lieto, founder of the illustration news portal LCSV4, started a new project called MAiLmeART, where you (yes, you!) can win prizes by mailing him your artwork. The catch is, the art has to be on the envelope itself!
This one above was submitted by Stephanie O'Hearne.
Link - Thanks Darren!
I use to write little messages all over the envelope...but those submissions are wow ;D
Check out Post Due for some postcard art.
http://www.postdue.com/