Something happened back on October 14th: three make-your-own-quiz applications started growing really fast, and they havent stopped. Meanwhile, on our list of the 20 Facebook apps that gained the most users this past week from , were seeing the usual mix of games, simple gifting apps, and Facebooks in-house iPhone app. Who was i, in my past life ? Heres more on the quiz mystery. , grew from 2.30