Hello -
My last laptop was a MBP 17" Core 2 Duo, and before that my beloved G4 Titanium Powerbook. On those machines, after a while I noticed a slight imprint of the keys on the display from the lid being closed. This MBP Seems to have a bit of a ridge on the display to keep it from touching the keys.
Are you all using any kind of cloth or anything to protect the screen when you MBP is closed?