With the devise convertion, I pay less for C2D than you would thru Newegg, but they beat my supplier for the Q6600. It is now 659U$, that's a huge drop. Don't rush to buy one yet though, as it will drop near 500$ qute soon and to the mid-200's $ by September.
It's insane the computing power we can now get for cheap.
A box with a 3600+ A64 X2 on an Asus M2A-VM with 2GB of DDR2 667MHz RAM and a 250GB HD/18X SATA DVD-RW, all this fitting inside a good enclosure with a decent power supply can be purchased for 400U$.