When my old Apple Mighty mouse got gummed up, I bought an Apple Magic mouse to replace it. It wasn’t that the old mouse was completely useless, it still worked up to a point – it’s just that the scroll functionality didn’t.
The Magic Mouse is a superb device. It’s slick. It’s smooth. It’s beautifully built. In fact, even the packaging is beautifully built – and out of better quality plastics than most other manufacturers use for their actual mice. The box is also just about the right size for a Raspberry Pi.
I'm sure you can guess what happened next, with the aid of a Dremel. You can see the before and after shots, and read more here: http://www.45rpmsoftware.com/wordpress/?p=259
I hope that you like it.