I you didn't want an iPhone you will now! There are several new Twilight aps for the iPhone and iPod Touch, like the clock above. The clock application ($1.99) allows you to display the time in five different Twilight fonts and in eight different colors.
You don't have to carry the printed copies of all four books with you anymore either. You can now download them right to the device. It looks like the best price is from Amazon in the Kindle format. Twilight and New Moon are only $6.04 and Eclipse and Breaking Dawn are $9.99. You don't have to have a Kindle to get them, the Kindle app is a free download.
There are several Twilight Trivia apps ($.99). Quizner’s has 13 Twilight quiz titles and Hot Potato has three trivia games. Test your knowledge of all things Twilight.
Also according to Jay Siegel at Examiner.com
There are a variety of Twilight themed skins available to protect your iPhone/iPod Touch. You can get a redemption code for a free skin when you buy the DVD from Barnes and Noble