One time when I was surfing around, I saw a site that had photos of a diy frame and its construction. (sorry I guess I didn't bookmark it), it was assembled much like Larry's post the only difference, and I thought it was quite a good idea, was that the guy had used clear christmas tree lights to light it. -very inexpensive, and in the photo at least the ooster and the milk-white plexiglass diffused the source enough that you couldn't see the individual bulbs.