>>1383691Jailbreaking the iPad allows some pretty extensive customization. I managed to theme my iPhone to look like this. [It's an old screenshot, I managed to get the dock to look a bit better, but I don't have screenshots of that.]
So things are definitely possible if you're willing to look around and put some effort into it.
I'd imagine setting wallpapers would work better if you fit them to the correct resolution in Photoshop before trying to add them to the device; that's how I frequently set my wallpapers on my iDevices.
