I love waking up and finding a great project from a reader like this ergonomic mouse (cache). As you can see from the picture, the centerpiece is the massive scroll wheel made from a VCR head. He credits jpaturzo for the idea. The inertia of the wheel gives a lot better sense of how fast you are progressing through a document than methods like auto-scroll. The mouse is assumed to be more ergonomic because it keeps the bones in your forearm in line. The hand rest on the mouse is formed from Shapelock.