NVIDIA GeForce 8800 GS upgrade for 24" aluminum iMac -- can it be done?

I have a one-release-previous 24" aluminum iMac (bought about 2 months before the newest one was released). I play a lot of World of Warcraft, and would love to upgrade the video card to the new NVIDIA GeForce 8800 GS that works in the current 24" iMac.
Is there a way to do this at all? Apple solution, third-party solution, anything? I've heard rumors, but can't find out anything for sure.
All help appreciated.

Yes, I think it's technically possible, but you'd have to purchase the stock part from an Apple specialist (a corporate store probably wont do it) and have them install it. Expect to pay $300+ for the part alone. Even then, there's no real guarantee that it will work, even though they do indeed use the same form factor. There may be power/thermal issues.

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    Gregory Rivers wrote:
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