Machine Zone Inc., the mobile game startup that created Game of War, has hired a high-level Wells Fargo Securities executive as its chief financial officer. The Palo Alto company, which was valued at about $5 billion in a funding round two years ago, tapped Dan Nash to be its finance chief. He had been managing director and head of internet investment banking at Wells Fargo Securities. "I am very excited to welcome an amazing talent like Dan to MZ. Dan will be instrumental in accelerating this...