Took this one with my iPhone (Camera+) today when it was raining like hell. It reminds me of the default background image of iOS 4. So you may also wanna try it as wallpaper on your iPhone or iPad. Enjoy :)
Important: on the iPad you can specify which parts of the photo you wanna use for portrait and landscape orientation… in order to have room to experiment, make sure you download the original sized photo and not just the 1024x768px version.
And in case you're interested in the original photo, you can check it out right here.