Those are odd comments. The Cell is no more complicated than any PPC. The SPEs don't even have to be used. IBM may not provide a wealth of information on the product, but there's more than enough to code for it. As you pointed out Andreas, the Nvidia GPU is far more mysterious.
Its a shame there are so many negetive responses on this idea as I can't think of an OS that would be better suited to the PS3 than MorphOS.