Hi everyone. I'm just about to buy my first Apple TV to hook up to my 42" HDTV. I've got a few basic questions... What "happens" when you turn the thing on? Does it connect wirelessly (bluetooth?) to my iMac and show up like an iPod or iPhone and allow me to load content onto it that way? Can you easily remove and add new content? (Like an iPod or iPhone?) Basically I'm just wondering what options I have for getting content onto the thing... If I seem absolutely clueless about the Apple TV, it's because I am. I've never even considered buying one in the past, because i've never had a wide screen TV until now. So I literally know almost nothing about them. Any info would be appreciated. Thanks in advance!