Handcrafted CSS: More Bulletproof Web Design (Rough Cuts)
Flexible Web Design: Creating Liquid and Elastic Layouts with CSS (Just released)
Trascending CSS (Released)
Learning the Yahoo! User Interface library: Develop your next generation web applications with the YUI JavaScript development library (Released, for yui and some javascript)
All but one of those (the yui one) is available on Oreilly's Safari bookshelf. ~$40/month is nothing to scoff at but if you're in an intense learning period, I find that it is a no brainer (you don't need to agree to more than a month).