You can do tabless skinning for nice simple sites... they still carry the table structure within module. However, I have been working with a couple of talented people who will be showing how to deploy dnn xhtml compliant skins.  I have seen them in action and we're now putting together articles on how it will be accomplished.

There is a nice  simple css skin, not really for commercial use but a great step forward you can work with at http://css.dnncreative.com - Lee has some tutorials you can pay for to learn more about it.  What I will be doing  is working with the more experienced css people and working on more cutting edge designs that push the envelope a bit further.  When I get back from my overseas trip we will finishing the articles.

But yes we're getting there and yes DNN does put the tables in at this stage.

Nina Meiers

It is possible as Lee says. Here are a couple of sites I have made : http://www.obrienit.se and http://www.obrienit.se/cityost - they are both CSS and valid XHTML. I have had to tweak the core a little to get this to work.

Some of the DNN modules are coded with tables. DNN itself doesn't add any tables, only the modules do. It is fairly easy to change all of this - if you register on my site there is a tutorial explaining the steps. I will be adding a free version of the cheese shop skin later.