The CSS presentation itself is quite beautiful. The content of the presentation discusses using advanced CSS techniques to push the limits of standards based layout with XHTML/CSS.

Part II of Douglas Bowman's series on using CSS to create tab elements using CSS, this time showing a new scenario where no tab is highlighted, combine Sliding Doors with a single-image rollover, provide a fix for the clickable region in IE/Win, and suggest an alternate method of targeting tabs.

Douglas Bowman gives an excellent tutorial on layering background images, allowing them to slide over each other to create certain effects, such as tabs.