Hardly exhaustive (or authoritative) this is just a bunch of links to sites mentioned as part of the tutorial on web design for MDS, to save me having to produce a hand-out...
users find new things difficult.. youtube.com/watch?v=pQHX-SjgQvQ&feature=related
alternative navigation
I'm not at all sure that it actually works, but it's an interesting idea, and the web could do with a lot more of those.
tag cloud
An alternative method of navigation for complex / large sites with a diverse range of content that doesn't fit cleanly into section/page tree hierarchies: elsewhere.co.nz/tags. Interestingly enough, this clever alt.navigation system (pioneered by Flickr) has already been perverted into an oooo cool but almost completely useless cumulus tag cloud plugin for Wordpress (I've only used it on one site, honest)
web safe fonts
It's not all Arial & Verdana
This is a list of web safe fonts with indication of relative likelihood of availability, with the idea that you can choose a preferred font, and several fail-overs in order of increasing probability (but presumably decreasing desirability)
And another less comprehensive set of web safe font choices, but includes suggested fail-over options, which are handy when you're on a Mac and your clients (inevitably) are on Windows IE6.
css
the power of separating style from content in your site design - same content, a thousand different styles (mostly ugly it's true, but it's more about the concept than the execution). One style sheet to rule them all: csszengarden.com
books
The ultimate master of information design - not much on web, but the principles still apply, if anything even more so than in print: edwardtufte.com/tufte/books_vdqi
Every web designer in the world must read Steve Krug's Don't Make Me Think: sensible.com.
Most books on web design as design suck (even if they don't appear to at first, after a year you realise they were completely sucked into whatever the zeitgeist of the moment happened to be) so I tend to go for the more general books on design principles - applying them to the web is only a matter of increasing allowance for flexibillty without compromising the core.
handy tools (Firefox plugins)
Chrome is the nicest, fastest browser for general use (even if the Mac build is a bit flakey), but you can't not have Firefox for checking web designs, just because of the huge number of handy plugins. (I use Safari too, and Camino, IE6 & 7 through Parallels, and Opera... it's been a while since I looked at anything in Lynx)
Firebug for Firefox - see under the hood of websites and tinker with them: getfirebug.com
Colorzilla color picker - grab colours from sites: www.colorzilla.com/firefox
Web Developer Toolbar - test sites for validation / check screen sizes / page size .. etc: addons.mozilla.org/en-US/firefox/addon/60
MeasureIt - measure site elements to the pixel: addons.mozilla.org/en-US/firefox/addon/539