Way ahead of you, Justine.
(The file’s here if you want to use it for your iPhone - click view at full size without watermark. You can also open and edit it if you can do a better job aligning it than I did. And FYI, if you want to make your own iPhone wallpaper with a totally different image, the size should be 320x480.)
Ladies and gentlemen, your new iPhone wallpaper.