Offering desktop wallpaper to promote photography?

What do you think? Is it worthwhile to create desktop wallpaper to download for free in an effort to drum up more awareness for an artist’s photography? Not necessarily the images which are sold as prints, but perhaps images taken with the sole purpose of distributing as wallpaper. Good idea or bad? Worth the effort? Selling my soul to the devil? (or would that be micro-stock photography)

By the way, has some great wallpaper for free in a variety of sizes.