"Cover a light bulb with a doily and spray paint it. The light will shine the pattern onto the walls." I don't know how I feel about flammable spray paint on a hot lightbulb. Maybe spray paint them silver and use them as non-light decoration?
Dishfunctional Designs: Global Recycling: Old Globes Upcycled. I like all the ideas, but may actually try this one! i already have about 10 globes so I should probably do something different with some of them anyway!