Kotaku is reporting that SCEI Chief Technical Officer Izumi Kawanishi has been moved from SCEI to Sony Corporate. The rumor is that Kawanishi is upset at the 40gb PS3 because of the reduced features. They also say there was friction between him and Kaz Hirai since Kawanishi wanted that job.
http://kotaku.com/gaming/rumor/power-struggle-at-sony-computer-entertainment-319183.php