To be honest, I hated the w3 so called "tutorials". They explained nothing about how the code worked. Here's a few of the best from my bookmarks folder titled "CSS"
http://websitetips.com/css/
http://leftjustified.net/site-in-an-hour/
http://www.glish.com/css/
That should get you started, and then you will know enough to understand 95% of the other tutorials on the web about CSS. Good luck!
