If you can get it up a little, you can use tweezers to twist it out. If you can't get it up at all, sunrisetech is right, drill it out. However, if your just replacing a hard drive, you'll need to put it back in again, so it might be worth buying the iBook Clamshell Screw Set to replace it.
[quote|QEIIRepair]If you can get it up a little, you can use tweezers to twist it out. If you can't get it up at all, sunrisetech is right, drill it out. However, if your just replacing a hard drive, you'll need to put it back in again, so it might be worth buying the [product|IF149-008-1|iBook Clamshell Screw Set] to replace it.[/quote]