A nice CSS resource
I was recently contacted by Wei-Ling Chen of DZone about a great and free CSS resource that they have available: CSS Refcardz. It is written by Molly E. Holzschlag and it looks like a nice and concise reference for CSS visual models.
Here are some of the topics discussed: The CSS Visual Model, The Box Model, The Power and Problem with Floats, CSS Positioning, Core CSS Wrap-Up, Hot Tips and More.
It looks like a nice resource, I hope that you find it useful!