my 17" PB has a cd drive that has decided to make noises. they are quiet lil hums, but are just loud and frequent enough to make me nervous. the drive still works, but it didnt always make sounds. the only relevant information i have about the drive is that one time i was doing hw and i was tapping a rolled up newspaper against my desk to the beat of some music. i guess i wasnt paying attention b/c i tapped my cd drive and it made a loud noise. i later tried a cd in it and it worked np. my question is, do i need to worry about some hardware of mine failing here in the near future? i dont have applecare b/c its too much money and i can only imagine what an arm and a leg it will cost to get the superdrive replaced