Glass in IE6?!?

Those of you lucky enough to attend the PDC keynote this year saw the cool glass effects
we're working on for Longhorn. Well, you don't have to wait for Longhorn to get glass
on your desktop. You can do it with IE right now!

https://w3future.com/2003/glass/glass.html

The author claims the use of nothing but "HTML, CSS a bit of JavaScript and a lot
of Internet Explorer filters."

You need a fast machine, but it's pretty darn impressive.