I guess it really depends on how Phenom actually performs in the real world.
If AMD can get Phenom clocks up, Intel may firesale the "old" 65 nanometer quads to undercut from below, and then crank the Penny parts to 3.4, 3.6, maybe 3.8 ghz to hold the high ground.
As I understand it however consumer 45 nano quads will not show up till January of 08, so I guess we will all have to make due with $270 Q6600 quads till then...
It's not like the Q6600 is exactly a bad deal at +/- $270 after all....