I want to learn more about XHTML (I have mild knowledge already). I want to know more about how it works and how to use it. I need a good website that can teach me more about it. I want the page to be fairly simple (sort of like Lissa's site) without endless amounts of useless information. Does anybody know of a good one?

XHTML is a web standard. Newer version of browsers are supporting it, because the code is easier to render, and can be supported better

i wrote up a basic article on making your website XHTML compliant

http://www.limitlessky.com/~alkaline/xhtml.php

xhtml can go more advanced using css and div layers instead of using tables which are supposedly not as great to use