It's been a week now since Faber and Faber, the UK publisher, released Malcolm Tucker: The Missing Phone, a comedy that takes the form of an iPhone app, and somehow the nation survives. For those who aren't regular viewers of the BBC, a bit of explanation: Malcolm Tucker is the expletive-spouting spin doctor for No. 10 Downing Street in The Thick of It, a wicked smart comedy series that does for UK politics what The Office did for corporate bureaucracy. At the center of the £3.99 app is a delicious conceit: That you have stumbled across Malcolm's lost mobile, which is crammed with enough incriminating emails, voicemails, text messages, and attachments to bring down the government. And you've got it all in the palm of your hand.