Get 2 small flat wooden sticks like come in icy poles / ice blocks (we often call them paddle pop sticks).
Stick one in the DVD slot near the middle angled up, the other just next to it angled down.
Bring the two together so they're one over the other and pinch the DVDs between them and pull the sticks back out the slot. Might take a few tries but you should get them out.
Failing that you can pull the case off the PS3, pull the case off the Bluray drive, then pull the DVDs out manually, but that's way more involved and will void your warranty!
stu
January 2008