according to http://sitening.com/seo-tools/seo-analyzer/my-analyzer/ nested tables shouldnt be used and CSS should be used instead. Does anyone have any examples of CSS page alignment? can someone suggest some tutorials in CSS page alignment? Does it really matter that much for SEO onsite optimization?
If you are a CSS newby, start by learning enough CSS so that you can do your page-lay-out with just the one table (not nested). CSS-free layouts are possible, but there is a significant learning curve. Table-less layouts have significant advantages, for instance in the area of bandwidth. For SEO it helps to have your links as text links instead of pictures, and to have your headings in actual <h1>, <h2> and <h3> tags - styles with CSS. To have nested tables isn't an advantage, but I'm not sure it's a very big disadvantage for SEO. It does make for bloated code and more work when your redesign.
CSS generated sites are better than tables because it slows spider crawlability, remember spiders are also like humans. Divs uses lesser codes and faster site loads.
If you are CSS newbie, have a look at these really greate tutorials: http://www.html.net/tutorials/css/ http://glish.com/css/