Unregistered with the 12" display and the 867 MHz PowerBook. MA won't really see a speed improvement because it spends relatively little time in the calculations. I suspect that MA is almost complete limited by video hardware on your machine (I get 90 fps on my 800 MHz 17" Powerbook with 8 fish/millions/shimmer on, etc). I'll bet turning shimmer to full then to off affects your fps only a few frames. However, there are a couple tricks besides Altivec which I'll be playing with, and which should improve performance for you.
The G4 question has to do with some much more demanding animation and geometries I'm working on.
Thanks for the responses and please keep them coming.
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