Clagnut Sandbox: CSS tips, experiments and tests little repository. I've found there a few tricks I already know I'm going to use…
CSS (37 posts)
WordPress Plugin : Avatar Popup
Avatar pop-up frenzy !
IE7 with PNG Support
IE7 will have transparent PNG support. Not too early.
Redesign
Everything redone.
Now that's interesting, a simple CSS file to hide ads and banners. Of course, requires a bit of CSS3 support (selectors) and the ability of using a custom CSS that applies to every site. In other words, requires Firefox.
Gravatar and the Broken Image Icon
Implement Gravatar with no fear of the site being offline
Splintered Experiments: a collection of short yet advanced experiments, in CSS, webdesign, Javascript… Quite a few interesting things over there.
NoBlog
Nofrag a des blogs
Skinning Gmail with a Custom Stylesheet: modify Gmail's look & feel with a custom .css and scheme you like. This is a nice example of per-domain stylesheet ability of Mozilla and Firefox.