Wow, it's just awsome how many ideas there are concernign the CDs. I always wondered what to do with them too, but the "brightest" idea was to give them to kids. I'd love to cut somehting out of them like stars or new year's trees, but I don't know how to do it for the disks not to crack.
My husband uses them as stands for different things - starting with cups and finishing with home decor. For example, he glued the Sahara Rose (wierd salty rocks) we brought from Tunisia on a CD.