I've just been doing the Lynda.com stuff on XHTML and CSS, and got all excited because I'm starting to play with Joomla. Then, to my horror I viewed the source code on a page I had generated. Without my knowledge (or permission!) it had generated all these ugly tables! So.... if a client wants CMS, I guess Joomla is the easiest, but their website performance may be compromised a bit because of tables? Is tables really that big a deal?