I recently bought a Canon SX10 IS and it's an awesome camera. After I got CHDK running the only problem I have is that I can't put filters on it. There are adapters to let you use them, but until I get enough money to buy it, it's no filters for me.
I love the effect star filters give. I looked around and found a home made one on Flickr but there weren't any instructions on how to make it, so I figured I would make an 'ible showing how I made it. Credit goes to Rey Nocum for the original idea, you can find his page here http://www.flickr.com/photos/reynocum/sets/1804553/
*Please note this will work on any camera/slr lens that you can attach a lens hood to.