Set me straight on RAM requirements for 8 core

I have been hearing you need 1gb ram for each core. Or at least that's what people are recommending. Isn't 8gb a little overkill?
I'm going to do HD editing. I would think 4gb ram would be pretty good. Of course, I realize more is always better, but is 8gb really necessary?
Feel free to chime in, but I suppose we will find out when the 8 core's are shipping and what Leapard/FCP will bring us in the next few months.

"Phil, do me a favor... PLEASE... check your page ins/outs and try running your machine a little harder and you tell me if you see a difference when you do get your RAM... "
Of course I'll see a difference. I EXPECT to see a difference, that's the point. But where you and I differ, is that you're expecting the upgrades to make your machine more stable. Mine is already stable - the only thing I'm expecting is increased performance. I'm sure page outs won't be completely eliminated, but they'll be much, much more reasonable that what they are now. I also use a G5 Quad with 8 gigs of RAM and rarely are the page outs "zero". However, even with them about 5-20%, the Quad doesn't skip a beat.
"Mr. Shockley only has 2 GB of memory, but I bet he can go to dinner and come back by the time his workflow has completed."
Well, not quite that long but sure - the limited RAM I now have is causing tasks to take longer than needed. (I've developed a serious hatred for the sounds of disk access!) But while they take longer, the tasks DO get completed. Keep in mind I use several apps in Rosetta, including Photoshop CS3.
"Uh oh, I ordered my Ram before I knew it used different chips."
It wouldn't hurt to call but I don't think I'd worry about it. The 8-core blurb probably just means the new part numbers reflect what Apple has tested. None of the third party RAM vendors/companies are showing a "specific" module for the 8-core. (Even before the 8-core machines, Apple would never publicly say third party RAM was "compatible".)
Apple also says the same thing in the blurb about hard drives. I can't imagine one SATA hard drive is compatible while another is not.
Their term, "qualified" means they've tested the part.
-phil

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