Collecting links for js/dom/dhtml/xml

In my tries to make my überdocumentation sticky the best resource for JavaScript and related technologies (DOM,XML,DHTML) I'm now in addition to the regular documentation and references in search of threads with good explanations of how things work, concepts and approaches; on these forums and elsewhere. Maybe you that have been on this forum longer than I remember some thread or other that is worth mentioning.

(That sticky is getting big...)

for javascript this site is really good I think
http://www.devguru.com/Technologies/ecmascript/quickref/javascript_intro.html

Ok, now I have two documentation threads, one in the JavaScript foum, one in the HTML & CSS forums. If you have any links for any of them, post them here or PM me them.

I especially want good tuturials for css, semantic coding, html and dhtml. So, come on, I want to be buried with suggestions before I make myself sparse over the summer...