Welcome to WordPress3.org - Coming Soon!
CSS Reset.com
Awesome CSS Reset resource and Free CSS Tutorials site. If you're a CSS developer, you should definitely check it out.
Download Wordpress 3.x from Wordpress.org
The official download site for the latest bleeding-edge version of Wordpress 3.
Wordpress Codex
The official documentation on Wordpress.org, written and maintained by the community - the one place to go if you're confused about Template Tags and Loops.