Funny that a page about Web usability features a design that's sufficiently counterintuitive (or just plain annoying to smoothly scroll through) that the designers felt the need to add site-specific navigation controls and "click here or press space to scroll down" help text to the page.

Presumably these are the same designers who feel a "push" sign next to a nonfunctional handle is a good design for the hardware on a door.

That spinning-scrolling effect is really neat.