4x6 Art is the brainchild of Jeremy Vincent Adolphson, and the premise is simple: send a 4x6 card to an artist, see what you get back. And he's gotten stuff back all right, from Darick Robertson to Bil Keane and from Will Eisner to Neil Gaiman. Absolutely fascinating. And you're kicking yourself in the ass right now because you didn't think of it first.

Pictured: the card from D'Israeli, kickass illustrator of Lazarus Churchyard, amongst other things.

Found at Boing Boing by Rox of Spaz-House.