Great little time line viewer and other cool visualisations.

http://www.simile-widgets.org/

For those wanting a live example of what various styles perform
http://www.somacon.com/p141.php

http://www.filamentgroup.com/lab/accessible_custom_designed_checkbox_radio_button_inputs_styled_css_jquery/

Quick live examples of various layout techniques
http://www.barelyfitz.com/screencast/html-training/css/positioning/

Friendly to all browsers form layout
http://www.alistapart.com/articles/practicalcss/

It is very frustrating searching the net for a range of free icons as most that claim to be free are just pointers to crappy icons which then offer another range of paid ones as well. While I think people should be paid for icon design I think it makes it hard to find icons for a small project or admin screen.

Here are some links to some known FREE icon libraries
http://www.axialis.com/free/icons/