I think Apple has a policy regarding burnt/stuck pixels - but they are a company trying to minimize customer complaints and will bend to a constructive argument if you don't objectively meet their requirements. You have to ask yourself if you think it is worth the time it will require to convince Apple that the subjective argument makes it worth their while.
You can ask Apple how much it would cost to replace the screen completely... they might be able to cut you a deal if you explain that the pixel somehow limits you, and that it is effectively their quality control that is at fault.
Alternatively you could try the "massage" of your stuck pixel. I hear that works well in a fair amount of cases...
-Wyrm