EDIT: As of April 28, 2010, the official site is back online. Go check it out here! He'll probably be updating it soon enough. (Still at 0.99c)
Marble Mouse Scroll Wheel, or Marble Scroll for short, is a program designed to add good scrolling functionality to the Marble Mouse (or Trackman Marble).
Here is a copy of the site's text on Archive.org:
They don't archive everything, so it took me a bit longer to find the installer. Click the Download link at the left, or here, if you want to get it.