Here’s some great references for CSS3 and some HTML 5
HTML5 Boilerplate – A rock-solid default for HTML5 awesome
cssSandpaper – a CSS3 JavaScript Library
Selectivizr – CSS3 pseudo-class and attribute selectors for IE 6-8
CSS3 PIE: CSS3 decorations for IE
ie7-js – Project Hosting on Google Code
CSS3.0 Maker | CSS3.0 Generator | CSS 3.0 Generator
CSS3 Generator
CSS3 Please! The Cross-Browser CSS3 Rule Generator