John Baichtal @ MAKE has a great review of the design-your-own shoe service through Zazzle. He writes:
Online service Zazzle basically prints on anything. Want a one-off t-shirt or mug? They got it. It’s somewhat like Ponoko or Shapeways, you either generate your own design or choose from one of theirs, and then add-to-cart and the item is manufactured and gets mailed to you. Which is not necessarily all that interesting — countless services will provide that service.
Enter the printable, customizable shoe.
Zazzle offers design-your-own Keds, hi-tops, lo-tops or slip-ons with prices ranging from $50-65. Recently I had the opportunity to try out the process. The lo-tops I created (above) featured four printable surfaces (inside, outside, tongue, heel) each able to accommodate multiple graphics files, text, and background colors. You have your choice of eyelet, lace, rubber, stitching and lining color.