Microsoft's Thoroughly Modern IE9?
Hachamovitch also says that IE9 will utilize hardware acceleration to render graphically-rich sites faster and better. Sounds like a good idea, and like an example of Microsoft attempting to make the fact that IE only runs on Windows into an asset rather than a liability. (Browsers that run on multiple platforms are presumably less likely to get a thorough tweaking to run especially well on one particular OS.)
Still no word on what the company is thinking about interface changes, or when it intends to release the browser. I'm still rooting for a major facelift, but we'll see...