Aww that kind of makes me sad, like a deteriorating Mac on a dump.
There's a little guide plate behind that logo within the LCD display. You can open it up and glue it back in place (It's been 10 years after all!).
There's plenty of guides on this, those earlier models had quite a bit of space and you could do stuff like put in an LCD and have it display images. Or change the colour/pattern etc.
Or you could just leave it as a war wound, it's getting old after all, kind of adds to the character.