I really enjoyed reading your tutorial. After reading it, i went ahead and applied your methods to a DNN 3.2.2 install, and then tryed a 4.0.2 install. I learned a bit in the process, and got more familiar with proper xhtml usage.

I was thinking of re-doing my site utilizing what i learned from your tutorial, and the ton of threads about the subject, both here and other xhtml and css related sites, and saw that we were looking at a major DNN upgrade 3.3 / 4.3 and decided it would be best to wait and try on the new DNN instead. Also, there was some mention that DNN framework itself may try to implement some of the simpler issues that we face towards becoming xhtml compliant.

One of the problems i ran into was changing the default.aspx file with proper closing tags. On some DNN versions, it would not render them, so i thought i will try again on the next dnn version.