http://www.ehow.com/how_5940891_eject-disks-stuck- inside-ps3.html

nebo

How to force-eject the game disc?

Solution
Follow the below procedure:
Note: This procedure does not work on PS3 60GB

- Turn off the PS3 by removing the power cord.
- Put your finger on the Eject button and hold
- While keeping your finger on it, turn on the PS3.
- Wait for 10 to 30 seconds (during this time, the fan will be louder than usual) and release.
- Your game disc should be ejected.