As it continues its downward spiral, Research in Motion has parted ways with two top execs as well as board member and ex-CEO Jim Balsillie. On Thursday, the maker of the Blackberry smartphone announced that in the fourth quarter revenue topped out at $ 4.2 billion, a 19 percent from the previous quarter. Such a drop is particular large when you consider that the fourth quarter spans the holiday buying season. Revenues were down a whopping 25 percent from the fourth quarter of 2011.