Thanks for the guide, about to do this to a base 2.8 quad that I just purchased. I ordered the chip off Amazon, since there's no tax, I'm a Prime member, plus I can use my American Express awards points. This is the chip I ordered:
http://www.amazon.com/Intel-BX80613W3670-Xeon-W3670-Processor/dp/B004O4XPQO/ref=sr_1_1?ie=UTF8&s=electronics&qid=1309189787&sr=1-1
Model/SKU matches, but just want a second pair of eyes to make sure I got the right chip. Plan to do this simple but amazing upgrade sometime this week.
Yep, the cpu is fine, you will love the upgrade, and phil has made it so much easier with the guide.
Good luck!
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