I got tired of not using the jog dial on my Sony VAIO laptop. Fortunately Takaya Kinjo did the hard part of writing a device driver for the jog dial. I added an application that uses his driver to make the jog dial turn into the equivalent of a scroll dial on a mouse.
I've sent my code to him; in the mean-time, an alpha version is available here. Be warned, it currently requires manual compilation and installation.
Download jogutils_with_scroll.tar.gz.