Here’s a crazy picture of what my mouse does in an average hour at work. The background was actually divided between Photoshop, web and email. Large dots = mouse stops.

From Anatoli Zenkov Flickr page Small Java app available too.

Pro Tip: If you’re using Photoshop, take a screen grab of your desktop, then make the Mousepath image your top layer. Choose “Multiply” as that layer’s blending option – white background disappears.