Don't go overboard with CSS, especially when it comes to "positioning" ...
Code:
http://www.decloak.com/Dev/CSSTables/CSS_Tables_16.aspx
http://www.raizlabs.com/blog/?p=148
CSS allowed "coders" to get back into the site builder's game, however, chances are that any site built by a "coder" will look like, well, it was built by a coder.