The great Jon Hicks has put together a beautiful theme for Google Reader. Makes it look so much nicer.

Simple installation instructions for Firefox. First, install the
Stylish Firefox extension. Restart Firefox to make it work. Then go to
Google Reader and click on the Stylish icon on your status bar, and choose
Write Style > For this URL....

Download Jon's
gReader.zip file and open
greader.css from the
gReader/Firefox + Camino/ folder in it. Copy the text out of it and paste it into the big textbox in the
Add Style window. Add a description (I called it "Jon's Google Reader Stylator", but do whatever you want). And: pow! Pretty Google Reader! Everyone's a winner. Nice one, Jon.