My waste a day project is to make my online PHP/HTML course valid to xhtml strict. To be quite frank, I think the arrogant snits at W3C are doing the world a grave disservice with their pretentious little pronunciation of what is good or bad HTML. For example, you are suppose to end lines with a <br /> instead of a <br>. Image tags have to have a </img> and other rules that do nothing but makes it harder for people to hand code HTML.
The goal is to remove web page design from the common man and into the hands of the ruling elite. IMHO, the cool thing about the web is that it provides the underdog a chance to be heard. Who cares if the tags are in caps or lower case.