Diesel Civil Trust

Too bad that it's mostly the semantic HTML5 tags. (not that there's anything wrong with 'em)
I would have liked to see examples of audio, video, geolocation, local storage, canvas, etc.

May I recommend one to your list
http://prezi.com/

Even TechRepublic's site doesn't take advantage of widescreen, and I have all this empty space on both sides of the actual content. Why did I get a widescreen monitor if most websites don't take advantage of it.
From the examples above it seems that HTML5 can better scale to widescreen.

Ryan's selection is probably a good one but I can't see the point of this article because without links "the excellent use of HTML5" isn't demonstrated. Apart from Googling them all, there's no way to bring up the source and see how each script works which is the part that would interest me.