I've been using css based templated nearly for 2 years now. It is not really hard to accomplish removing all the tables and maintain the style. But if you are an upgrade maniac and try to follow every vBulletin upgrade you'll hate Jelsoft on each upgrade :D
Thats why i usually donot upgrade to latest versions and on each major release instead of working all the templates i decide to create a new style from scratch. But i never care to keep the look of vBulletin as i dont like it at all and without very carefull eyes my styles cannot be recognized as vBulletin ( the current one i use is half way done and it has the closes look to vBulletin )

Don't get me wrong your template is nice, but I wouldn't call it CSS based. I checked your sources and on your showthread template had the word table included 99 times. Your other pages didn't seem to have that many less tables either. Unless you have another style I would call it CSS styled not css based.

Next time before responding me , please try to read the entire post.

( the current one i use is half way done and it has the closes look to vBulletin )

Congrats Michael, on the good decision. You should sell this style.

I don't intend to sell it by itself - I do intend to sell sheets based off of it. I want it to be public as a foundation template set for multiple styles where users can just plug in the appropriate style sheet and be done with it.

I am considering adding some extra default divs, particularly for the header and footer, that will make the creation of decorative gutters and wraps easier to do.

--------------- Added [DATE]1231969104[/DATE] at [TIME]1231969104[/TIME] ---------------

Noting an idea here so I don't forget it. In the header I'm going to add a master wrapping div. However, the id of that div will be

<div id="forumPage_$forumid">

What this means is that with proper css selector use you can create unique look variations for each forum from one style sheet without using different style sets. For example, if you want the navigation to have a red background on one forum the css would be

#forumPage_5 #navigation .alt1 { background: #f00; }

There's a lot of fun that can be had with this.