Christmas tree ornaments or photo hangers. You can decoupage paper onto them and turn them into Christmas ornaments. Try googling CD Christmas ornaments. Seriously. :) You can also attach photos with glue over some pretty patterned paper on the CD blank. Hang from a string run through the center hole or punch a hole near the edge with a hole punch (heat the plastic for a few moments to make it easy to punch and to not break it).