The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
CoverWall displays your covers in the backgorund. It's like a giant, cool wallpaper, and all you have to do, is just start the application, and enjoy your artworks. It helps to rediscovering your long forgotten albums, or just helps to choose what to listen when you have absolutely no idea.Also, you can set up the animation types, and several things in the settings menu.If you like, try out the iPad/iPhone version of it.