Update: With the release of IE 8 we have a new challenge. Notice that gap between the bar under the header and the content, I haven't work out why IE 8 that happens. My CSS Test pages show a lot worse in IE 8. I have a new page that is currently tracking CSS bugs that I am finding in IE 8 on a new page for Internet Explorer.
This site gives techniques and provides resources for CSS that will help with web design. It also shows my perversion in exposing CSS browser bugs.
The majority of this sites' content is divided between articles and test of browser support of CSS standards. You will find techniques like the Sons of Ursidae nested list dropdown menus. If you are into browser bugs then the article, IE hasLayout and the return of the Guillotine maybe up your alley or Trident Rendering Bands. These rendering bands which was the cause of the IE/Win Escaping Float Bug and the IE/Win Peekaboo bug. These bugs appear to be gone in IE 8 but still we have to cope with the effect of these rendering bands with using the wrong size alpha transparency image.