This is the part of the article that cites Jason Barnard’s work:
The following video is about 30 minutes long. I highly recommend that everyone who has anything at all to do with a web site watch it. Not only does Jason Barnard (Twitter) reiterate some of the concepts I’ve been talking about here (and perhaps he does a much better job of it in some areas) but it gives us some context in how we might accomplish the feat of helping Google to understand.
Watch it. Really. If you don’t have time now, come back to this post when you have a half hour.