Not surprising, though; I don't use Facebook that much, and when I do, I just check the Wall for the latest updates and rarely browse any other section. But just in case you're interested, here's the list of all currently available keyboard shortcuts for Facebook.
Alt+1: Facebook's homepage
Alt+2: Your Facebook profile page
Alt+3: Friend requests
Alt+6: Account page
Alt+7: Privacy settings
Alt+8: Facebook's page on Facebook
Alt+0: Facebook Help Center
Alt + ?: Enables Search
Alt+m: Compose a new message
These shortcuts work best on Chrome. If you're using Firefox, you have to add Shift to the Alt combination, and if you're using Internet Explorer, you need to press Enter after each combination. Who knows, maybe these keyboard shortcuts will help you become more efficient while browsing the least productive website in the world...