I saw these a few years ago, and had forgotten about them, until W found them on the Internet again yesterday.
Now I have my EOS 40D, I have most definitely moved to digital, but there is still a place in my heart (and more importantly my cupboards) for good old 35mm slides. And this is a fantastic way to display them.
To be fair, I haven't really had a good enough wall to put them on before now, but they are great, and maybe I shall have to look at them again...