Last year a friend sent me a link about an international art submission called Mail Me Art. I don't know where I found the time, but I pulled a painting out on a bubble mailer just before the postmark date. I got the email that they'd chosen me to be in the show/book last spring, and now I've officially been published.
Here's a scan from right before I mailed it:
See, graphic designers can paint too (if they want to).
Also, you can purchase the book here via Amazon.