He may not be the first, and certainly won't be the last, but Josh Harker is another artist leveraging 3D printing as a way to get his art to the world. He's created an online store to market his works, which are created thru 3D print service Sculpteo. Admirers may purchase the works from his site.
But here's the interesting part: he's marketing the works in a manner very similar to traditional approaches. Whereas many print services simply sell 3D printed items in infinite quantities, Harker sells at least some of his works in limited quantities. The item above, the Delicated Ingress, will only be printed 25 times. The item also includes signed certificates, mounting, etc. But it also comes in colors of your choice, an unusual combination of art and personal customization.