The Zune Wall Paper Development Kit by ABI will allow you to see what your wallpaper will look like before you put it on your Zune. It helps you layout the design elements for your wallpaper around the Zune HD’s clock, icons, and bottom bar on the lock screen. It will even apply the shadow as if you were viewing it on the device. It is an awesome tool for Zune wallpaper designers.
Additionally, we are having a contest to see who can create the best Zune HD wallpaper. The prize is a Zune HD AV Dock. Here is the contest thread and stop into the Zune HD Wallpaper Forum to download and check out the entries.