These are really cute! They make great Father's Day gifts too:
CD Photo Frame
http://www.thefamilycorner.com/famil.../cdphoto.shtml
I also found this
Disko Disk Mobile
http://www.thefamilycorner.com/archives/kids/15.shtml
I've also seen a beautiful Christmas tree made from these, but that's a little too far off!
About.com also has some neat ideas:
http://familycrafts.about.com/librar...ts/blcdtrt.htm
I'd love to hear more!