the blackberry thunder is going to be marketed directly at the consumers. You're going to see devices like the 88x0 and Bolds, and even pearls somewhat marketed towards corporations, and then devices like the Kickstart, THunder, and Pearls marketed mostly towards consumers.
RIM knows that they need to expand to the consumer space, and the pearl was the first step in that, then the curve, and now they are really hitting their stride.
BES 5.0.2 MR4
Exchange 2010 SP1 RU2
WES 2008 Alumni