laichung in the forums pointed out that there is an interesting set of lecture slides on programming the PS3 Cell at cag.csail.mit.edu/ps3/lectures.shtml

It seems they ran an intensive course from December to January. The site also includes some good links to other PS3/Cell resources under the recipes and links menus. There's some cell pointers, using the frame buffer, using sound, IBM's course on Cell and IBM's Hands-On Tutorial on Cell Programming.