The Tutorial on Semantic Web Technologies, by Ivan Herman, is an excellent, complete tutorial on the semantic web. This is interesting for two reasons: (1) it is very complete and covers a lot of ground, and (2) is written in XHTML and CSS, yet it looks and acts like a PowerPoint presentation. There’s also a PDF version for printing.
The W3C has been busy with lots of activity on the CSS front.
> 2005-12-16: The CSS Working Group has released a First Public Working Draft of the CSS3 Advanced Layout Module defining grid layout. The draft’s features could be used to define visual order independent of document order, position and alignment of user interface “widgets,” and page and window grids. Also published are Working Drafts of Multi-Column Layout and Cascading and Inheritance. Visit the CSS home page.