APPLE WILL COVER EVERYTHING that is broken even if it's out of warranty!!! I bought my macbook air new in March 2008 and in 2010 my speakers busted and both hinges completely broke. When I mean "broke" the right one was complete detached from the base and the left one finally got detached last week (January 2011). The screen went blank and instead of a laptop I had two hunks of junk - a broken screen and keyboard base.
The apple website is no help and don't call customer service because if you don't have an extended service plan they will not help you. Though the website clearly states that the breaking hinges are a FACTORY DEFECT you can't speak to someone unless you have a warranty.
I made an appointment with my local apple store with their Genius Bar service. I explained what happened. They took it and replaced everything at no cost - The clam shell, the sound board, the hinges, and even a new 1.6 GH process/Logic board. I'll be honest I was almost crying when I saw what they did. Heck, they even cleaned it inside and out so it looks brand new. Apple went above and beyond what was broken. For this I am grateful.
I hope this helps. Go to a major market Apple Store like mine in Los Angeles(not a ma and pa or department store) because they'll give you the best (and free) service.