Have you applied the latest Surface (Pro and RT) firmware updatesyet?  If so, here's a quick rundown of some new keyboard shortcuts you can take advantage of for both the Type or Touch cover on the Surface RT and Surface Pro.

Fn + Caps:Locks the F1-F12 into being available as function keys. Performing it again sets it back to normal.

Fn + <spacebar>:Print screen (entire display)

Fn + >spacebar> + Alt:Print screen for the app with display focus

Fn + Del:  Raise the level of screen brightness

Fn + Backspace:Decrease the level of screen brightness

Fn + <left>:Home

Fn + <right>:End

Fn + <up>:  Page up

Fn + <down>:Page down