Quick link: Google Experimental Search
Wish you could use Google without having to reach for the mouse? See results on a timeline or a map? There's some cool stuff available that I haven't seen mentioned anywhere.
I have become addicted to keyboard shortcuts on search results myself. They are the same as the Gmail shortcuts (aka. the vi shortcuts), and they make searching and jumping to the relevant search result extremely efficient.
It takes a single click to enable it for your searches, so head over to the Google Experimental Search page.
PS: I had nothing to do with these features, I'm just a big fan, and think people here would appreciate the keyboard shortcuts — I know I can't live without them anymore.