When attempting to skin, or change the look & feel of a Sharepoint site, there’s a lot of to’ing and fro’ing with CSS.
Heather Solomon has a great reference chart – covering all the various styles (UI) – and where to find them in CSS.
The reference chart includes the “Class / ID” – as well as the specific file, and approx. line number – and a UI example :
I think we’ll be using this “a lot” when it comes time to doing more MOSS implementations – and changing the graphics, fonts, styles, etc.