[ame]http://www.youtube.com/watch?v=qvfSzVZriiY[/ame]
Now this a cool theme that you can use with your Retina Display. The theme is called GreyHD and it is free in Cydia. There is also a non-HD version of this theme for all of you other users. This theme gives you the opportunity of choosing your own wallpaper as well, so you don't have to be chained to the provided wallpaper that comes with the theme. Grey HD covers a lot of the great parts of your iDevice while allowing you to customize.