Hi,

Here an article describing that stuff.
http://www.pixelmill.com/support/support_article.aspx?ArticleID=kb101638
You'll find a huge load of article with a simple request like the one below
in google
http://www.google.fr/search?hl=fr&q=%22css+layouts%22+table+vs&meta=

So, the general idea is that CSS-Layout is best but you must master the CSS
language.

Hope it helps,
Martin

Additionally note that this doesn't mean you shouldn't use tables at all. It
means a table should be used to display tabular data but not to handle the
general organisation layout of a whole web site (as using css would allow to
move each part and a table based design won't let you to do that).

--
Patrice

see http://www.csszengarden.com for best examples