Once a normal cd got stuck in my ol` PowerBook G4, what i did is as it is said on the manual, hold the track-pad button at startup ( click ) apparently thats the shortcut to a forced eject, i don`t know if it will be useful in your case.
I personally thought that would do it, however you might want to reset the PRAM (command
alt+pr at startup until you hear 3 beeps) and you might want to reset the PMU ( in intel case is called SMC system management controller) [ force quit al apps, shut down computer, remove AC power cord, then remove battery and hold the power button 5 seconds, Then replug the power cord, the battery and turn on the computer ] since it like restarts your computer power management ( system management) it might help.