Solution
(works with slot-in drives, maybe you can do something like it) AT YOUR OWN RISK!!!.. My disc jammed in my MBP and it wouldnt eject. nothing worked, I couldnt hold the mouse in, couldn't manually dismount the disc and i even tried waving the rubber chicken around, over my head... in the end i used a very thin Credit card like plastic square, and put it carfully into the disc slot and holding down the CD, with it. Then i rebooted the computer. the drive thinks there is a disc error and spits out the cd. This useually works the first time, but some times you have to combine it with holding down the mouse button or trying CAREFULLY to move the plastic aroud getting it in a certain position, that makes it spit out the CD) ... Patients is a vertue in this case... . AND BE CAREFULL, i ruined a DVD once because i was in a hurry.