If you're a keyboard shortcut junkie in Google Reader, Gmail and Google Docs you might have noticed Google.com, the mother of all Google services, is a bit lacking in the keyboard shortcuts department. There is currently an official Google-sanctioned experimental keyboard shortcuts program you can opt into, although there's the slight chance that the company may one day kill it off. That and it won't remember to give you the shortcut keys the next time you search if you're not signed in to your Google account.
If both of these things are holding you back from keyboard shortcut dominance, worth downloading is Janakan Arulkumarasan's Google Keyboard Shortcuts extension for Firefox. When installed you can simply use your arrow keys to sift through the results, which get highlighted in a lovely pallid yellow. There are two ways to open up the result links: you can either hit enter, which opens the link in a new window, or enter plus control which opens it up in a new tab. The extension trumps Google's own keyboard shortcuts program in this regard.