Yes, but rarely. I try it once in a while, it makes me a little queasy, and I remember why I don't use it. I find cover art regardless, even if I have to scan something in. I use the album art screensaver sometimes.
I don't use it. It's neat for about five minutes, but as a maniacal completist, I'm annoyed by any gaps. I've quite a few boots as well, and I'm not always up to hunting down art or scanning in my own.