In the process of designing a floating wall and was thinking of having a small shelf above the centre speaker and below the TV with space for the likes of a Wii receiver / PS3 receiver / webcam etc. However, ideally, I'd be able to hide it away so it can't be seen unless it's being used. Any suggestions? I was thinking along the lines of a shelf with a lid on it - almost like an elongated jewellery box. Any other suggestions? Not even that sure I need this but I don't want to have the wall build and then wish I'd put it in.