Basically, Poke by Facebook will let you send a message which expires in 1, 3, 5 or 10 seconds after being opened, and it will require your finger to be on the screen all the time, meaning screenshots are nigh impossible to take unless you “cheat” by carrying a digital camera with the other hand. I guess Google must be miffed with Poke by Facebook, as the recently unveiled Google Maps for the Apple iPhone was knocked off its perch – and we do think this is rather undignified, especially when Google Maps is far more practical and useful for the masses compared to a Facebook app. Ah well, the world’s a strange place these days.