As you may already know, there are far more adventurous possibilities for theming your iPhone if it is jailbroken. Having been dissatisfied for some time with merely swapping wallpapers, I explored various theme packs on Cydia. This requires time and patience as some themes don't work well with other plug-ins and recently, I've stumbled upon PerPageHTML, which is a very cool alternative to Winterboard for those of us who like to install cool themes on their iPhones.