Then Spoonflower is the website you've been searching for. Coming on the heels of the success (and failure) of design-your-own-book websites and the Etsy phenomenon, Spoonflower allows users to design their own high-quality fabric.
Examples of users' designs abound on the Spoonflower Flickr group and site, from the sublime to the, ahem, idiosyncratic.
Dave has contributed to Dwell since its inception. He's a CalArts dropout, a former art critic for The New Yorker, and a producer of comedies on TV. He lives in, and writes from, Los Angeles.