User script to make Joel on Software blog posts print better

Joel on Software blog sometimes links to Joel articles and the articles have a "Printer Friendly Version" link below the subtitle. But the posts themselves, which are sometimes quite long, don't have a "printer friendly version". At least I didn't find one.
So I created a Greasemonkey user script to hide all the irrelevant stuff and leave only the post itself, so it takes less paper and ink to print.

This is of course only for personal use, as I remove the copyright string.
This is subject to change as Joel is currently redesigning his site.