That is no good.
It's a common issue with all the 2008 2.53GHz 15" MacBook Pro. I suggest to go back to the apple store and tell them. You might probably get one of the speed bumped MacBook Pro 2009.
Well this is a brand new UMBP 17" and its actually the second one with the same blueish screen, the first one i send it back because of a dead pixel, and it its practically the same...so it might be a common problem fixable with some calibration, but i dont want to mess with that, has somebody had the same problem? or "issue"?