XHTML & CSS
The Masters of the genre:
Sites and authors at the web standards coalface.
Adaptive Path has a fantastic article on the business value of web standards.
Tools & Information:
Help to make efficient and effective use of CSS.
- 10 CSS tricks you may not know
- Pixy Method (for image replacement)
Validators:
Table-free layouts:
Multi-column page layouts using CSS.
Search Engine Optimisation:
Multi-column page layouts using CSS.
- Abakus - automated analysis of current SEO optimisation.
- Overture/Word Tracker - latest search statistics.