Listamatic
I keep going back to Listamatic but keep forgetting the URL so this is as much a prompt for me as it is an endorsement of the site for you all. Listamatic has a huge list of lists doing different...

Guide to css in emails
David Greiner over at Campaign Monitor has posted a comprehensive guide to what CSS works in which email clients. invaluable to those who try and make email-outs look like thier website. It has tables of email clients verses the css...

Definitive solution to image replacement
Anatoly Papirovsky spends some time sorting out an elegant solution to image replacement that is cross platform and it works in "images off, CSS on" scenarios. http://fecklessmind.com/main/5/definitive-solution-to-image-replacement...

Nifty corners extended
Alessandro Fulciniti has released a new version of his Nifty corners script. The script is now far more usable, works in more browsers and the applications are endless. I predict this will be a main staple of many sites for...

CSS Playground
Stu Nicholls site has loads of interesting CSS experiments. You must be a little insane to want to build a font out of pure css! Worth a visit....

Full CSS Property Compatibility Chart
All the browsers and all the properties all laid out in a table - what works on what browser....

IE CSS underscore hack
Declarations with underscores are valid in CSS 2.1 and only IE recognises them! Potentially very useful hack from wellstyled.com...

Styling form controls
Excellent tutorial at 456 Bera Street for changing the look of your form controls. Includes good grabs of form buttons across platforms and browsers....

CSS negotiation
Great article from Andrew Krespanis at Left Jutified on what to set up in a default Cascading Style Sheet....

Text Rollover & Css, CSS rollovers with a twist
Excellent little tutorial about making text change elswhere on a page when you hover your mouse over a button/link....