currently in development, and the iPhone version didn't exactly hit the spot. Thankfully, the BlackBerry skin is awfully close to fulfilling our Fallout dreams. Modder sadosdemetrios has created a functioning Pip-Boy homescreen for the Blackberry, available for free at Crackberry, in your choice of green or blue.
The modder is currently accepting donations for his hard work -- please donate generously! The closer we get to inventing the real Pip-Boy, the closer we are to nuclear annihilation. And then, like EA Sports, we'll be in the game.