This is the first Mac I've gotten that isn't "ok out of the box". How long have you had your Macbook? I'm assuming that you used the expert calibration mode? Just curious, did you calibrate exactly the way it says to or go with your own intuitions?
I put my MacBook Pro next to my iMac and although they look like a pretty good match, if you look closely, you can see that the MBP has a tinge more yellow in the display. They all vary to some degree, I guess.
My new Macbook is at least improving but I've already ordered a replacement that should be here Weds..now I'm not really sure if I should just keep this one-you barely notice it anymore unless you compare it to one of the other Macs in the household. This issue seems to be out there to a degree, just that a lot of folks haven't really noticed it yet.