Hori's themed Protect Cases. They're an easy, inexpensive, and impermanent way to give your DS Lite a "limited edition" look. This way, you can deck out your DS like you spent $200 dollars on a bundle, but then if you decide that the game is terrible or something, you can just toss the cover and not have a constant reminder of your own folly on the top of your system.
From the looks of it, Tales of Innocence won't be terrible, and so there will no doubt be an audience for this nice-looking set. It includes a clear Protect Case and a maroon Tales of Innocence extending stylus, for $23. It'll be released on December 6th.