When you have a CD or DVD you can't get out of a Mac, the steps to follow are:
- press eject
- press option-eject
- (optional) hit the eject button within iTunes
- issue the '
drutil eject' command
- reboot the computer and hold the mouse button (or eject button) down during startup
If the disc still won't eject, particularly from a laptop, what steps do you try next?