1. Jim Halpert's claims notwithstanding, only a small amount of Dwight Schrute's speech before the annual sales convention was from Mussolini's 1941 "War Statement". Other portions were from Hitler, Lenin's "Declaration of the Soviet Government", The Communist Manifesto, Martin Luther, The Teachings of the Compassionate Buddha, and (I think) FDR's "Four Freedoms" speech.
2. Mussolini wrote letters to his daughter nearly every day, although many of them were quite trivial, and largely had to do with how happy he was that the Italian soccer team was doing well.
3. Although there is a general consensus among historians that Hitler was a jerk, there is still much controversy over whether or not Mussolini bit his weenie and whether or not it subsequently worked.