Another Dexter goody to hold you over until the September 27 premiere: the Dexter iPhone game. This 3D game puts you in Dexter's shoes, investigating crime scenes with Miami PD, and deciding who is worth of being your next victim. Dexter himself, Michael C. Hall, recorded exclusive dialogue for the game, and the story was written by series producer Tim Schlattmann.
It's on the pricier side of iPhone apps at $5.99, but it sounds like you get a good game for the money – users gave it four out of five stars in the App Store. PS: It will work on the iPod Touch, too.