I'm intending to buy a new Mini tomorrow. I'll run it headless as an iTunes and file server, so I won't be buying a keyboard or mouse. Is there any way to set it up from another Mac, perhaps by connecting with ethernet? I could borrow a USB keyboard, but nobody I know has a mouse, and I don't want to buy one just for five minutes. Alternatively, I could get the Apple Store to set it up. If they can turn on screen sharing, I should be able to set everything else up ok from my Air, right?