Ok so I might be over hyping this, but this is one of the coolest windows command prompt "did you know?" features that I've seen in a while. Lifehacker had a post about this article on smallvoid.com that lists what the function keys f1-f9 do when you're in command prompt (Start->Run, then type cmd and hit enter). Some features include bringing up the last command (perhaps done easier using the "up", "down" keys) and even bringing up a menu listing all the previously entered commands and letting you choose from them! Great hotkeys for people who use the command prompt. So fire up the prompt and check it out for yourself!