Have you ever tried implementing a MOSS based public internet site which creates HTML code without <TABLES>?
Are you looking for some guidance about how to implement an AA standard compliant accessible web site which can be read by screen readers or where you can modify the font size?
Microsoft Switzerland together with our partner 1eEurope implemented such a web site. We published this solution with the code here on Codeplex:
After installing this solution you get a complete starter site with master-page, content-page and content types which can be used as the base for your project.
You can find this sample site here: http://bks.1eeurope.ch/en-US/Pages/default.aspx