Got this from John Dietrich in a post in the Redfly blog.
The Redfly takes your wallpaper from your phone and simply copies it a few times (tiles it) to make it cover the redfly screen. So it creates "seams" and makes it look like the wood paneling at my parents house. John created a jpg with the proper filename so that when the Redfly is connected you get one nice wallpaper. It looks really sharp!
Here is the file if by a chance someone here is a redfly user.
BTW I brought my Redfly and Tabby only because I need Tabby to get on the crappy wrestling news sites. They are full of popups and extremely slow to load from a mobile browser.