Check out the variety of ways you can use wallpaper besides on your walls: Wallpaper It
I don't even want to think about trying to apply it to a ceiling! But I came across some old wallpaper recently that is pretty and subtle. I have yet to figure out how or where to use it. I need to line some drawers and cabinets, but this won't work for that... I'll have to look at it again--and these ideas.