If you add www.google.com to your favorites and change it's name to "..." (or something else easy to type). Now you can just type cmd-L to highlight the address bar, type "...", and hit return to go to google.
You can also use this for the google browser button search. I named it ",,,". Typing that in the address bar opens up the dialog to enter search text without even loading the google homepage.
[Editor's note: You can do a similar thing in Mozilla using keywords, as explained in this hint.]

