I mostly like the steelbook, it's a brilliant nostalgic use of the wallpaper they gave out back in 2006/07. Most of us have widescreen computers now but if anyone would like it you can still find it here
http://www.square-enix.co.jp/kingdom2fm/For those of you that can't figure out the Japanese just click the left option for KH2FM, then 4th option for the downloads (there's a cool clock thing I used to use on XP, not sure if it still works), then click the blue arrows right for more wallpapers.