I've read many posts here and none so far mention how much Google loves giving higher rank to websites written in XHTML and CSS. Forget about your tables and your <font> tags. Learn how to use <div> and <span> with CSS and you will be on the right track.
PS: Always try to work on making your sites more accessible. That will help you refrain from using tables for the layout.
I used DIV for a long time and never used table but I now like table better than DIV
If you use xhtml with divs and css, you're allowing the page content to be found and easy to read by text-based browsers, which webcrawlers basically are underneath. If you do this, people who are blind can read your site content by using screen reader software. Tables break it up a bit and the content might not make as much sense. If you really want to exclude this group, just use frames. The screen readers (and the search engine's robots) can't read what's inside.
I don't understand really...
So if you use XHTML google will rank your site higher up? =/