azz:
The entire page is quite interesting, in a somewhat cringeworthy kind of way: it's attempting to define a superset of HTML that's useful for building "rich" web applications.
However, this section's the most interesting.
It's a spec for parsing rubbish HTML. Like Jamie Zawinski's classic threading algorithm, it has potential as a way of handling broken HTML sanely while avoiding having lots of ad-hoc (and buggy) per-browser behaviour.
David: On the subject of which, they also came up with ping, which ... has problems (shame that Firefox has implemented it)
azz: Orson Scott Card is an idiot. (Hm, must be something about the name "Scott".)
Pharyngula does a much better job of ranting about this than I can.
David: Oh my. He's the chap who wrote Ender's Game.