if you've not alreay then i recomend that you get this plugin for firefox, it's sweet! If you've not got firefox then get it here
What it does:
Hundreds of scripts, for a wide variety of poular sites, are already available at http://userscripts.org.
You can write your own scripts, too. Mark Pilgrim's definitive Greasemonkey guide, diveintogreasemonkey.org will show you how.
I really like the fact that you can resize the fonts with the google 'your home page'