Cannon released a new Image Stabilization mechanism today. Here's a quote from the press release.
"Canon Inc. announced today the development of Hybrid Image Stabilizer (IS), the world’s first* optical Image Stabilizer which compensates for both angular camera shake and shift camera shake. The technology will be incorporated in an interchangeable single lens reflex (SLR) camera lens planned for commercial release before the end of 2009."

So can anyone tell me the difference between angular and shift camera shake? I guess I'll just be happy to know that this new mechanism does image stabilization "better".