Comment Re:The reason is the same as it has always been (Score 1) 425
There are 8 SPUs on the Cell, but the PS3 dedicates one of them to hold the Game OS. Another one is blocked off because IBM was having yield problems.
So the poster is right. Despite the presence of 8 SPUs on a Cell, only 6 are available on the PS3.
And there's actually a book available on programming the Cell (particularly on the PS3). It's here.