The answer as you see is no. FCP won’t take full advantage of all 8. But consider: what is your output? Are you delivering DVD’s to your client? If so, Compressor DOES (or should I say CAN, you have to set it up first. It doesn’t automatically do it!) take advantage of the 8 cores! And yes, I have an 8 core! It was worth EVERY penny because that’s where 99% of my output goes! If you save 25% on renders and converts, then you have spent your money wisely!
Fuzz