Did you know that you can create your own covers for your iPhone or iPad? I've been working on a genealogy design that features either a family tree (my own of course!) or a collage of ancestor photos so that I can give my kids a custom cover for Christmas.
At Zazzle you can create a custom cover or buy one of their ready-made designs. Here's a few examples:
Disclosure: I was given a gift certificate to Zazzle.com for my time and participation