Apple Insider uncovered some documents filed by Apple a couple months ago detailing some aspects of a touch-based interface in a full OS X environment. It shows a pair of horribly gnarled hands interacting with iTunes, and vaguely human hands touching generic windows and such. A sort of “virtual click wheel” seems to be implemented, although other than that there are few revelations.
I’m sure these documents will have no effect whatsoever on the rumor mill.