stevel
For a great Google style that matches Rubberducky:
Stylish allows easy management of user styles. User styles
empower your browsing experience by letting you fix ugly sites,
customize the look of your browser or mail client, or just have
fun. With an online repository at userstyles.org, you don’t
even need to know how to write styles yourself; just a couple
clicks and the chosen style is applied. Stylish is to CSS what Greasemonkey is to JavaScript, and unlike
other methods of using user styles, most styles take effect
immediately.
User guide: http://userstyles.org/stylish/help
Bug reports and feature requests: http://userstyles.org/stylish/discussion
Added text searching in the editor window, various bug fixes, added Polish and Ukrainian locales.
doesn’t work with Songbird 0.4, always sez it needs something else… but not WHAT.
I created a Songbird style for google that goes well with my Sparkle feather.
If you want to take a look & try if out, you'll find it here.
Thanks for a great add-on!

The best add on for songbird.
Some of my styles:
Hide More Gonzo Mini-album-art: http://userstyles.org/styles/12417
Hide navbar: http://userstyles.org/styles/12418
Thanks for the update!
valoches
nice addon !