I found this nifty little trick while looking around Digg.com. It allows you to skin or theme Google Reader (http://reader.google.com) and it sure does look better then the default!
You can use Mozilla Firefox, Camino, Safari, OmniWeb, and Opera. I tried it out on FireFox so it was pretty simple. You need to download and install the Stylish extension and then after you restart FireFox you’ll notice a little icon in the lower right corner (looks like a piece of paper with a paint brush). Click on that icon and choose Write Style >> For This URL. Paste in the special CSS file and it should change the look of the Google Reader page!
Stylish Extension for FireFox:
https://addons.mozilla.org/en-US/firefox/addon/2108
Special CSS File:
http://www.hicksdesign.co.uk/file_download/33
View this website for detail on how to get this trick to work with the other web browsers:
http://www.hicksdesign.co.uk/journal/google-reader-theme