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I found this SITE the other day:
"The Postcard Project is a way of giving everyone in the world a piece of art, all they have to do is ask.
There is no catch.
What she will promise you, is that if you contact her and send a valid mailing address she will create and mail to you a single postcard that is an original piece of art created by her, alone, as well the message on the back will be written and signed by her. She also promises that each postcard sent will be posted on her Blog (with no personal information about you of course!) If you would like to reimburse her for the postcard she would love it if you would comment on the blog when you get your card and tell her what you think of it."