Ruh roh Rorge! PS3 Slim not recognizing game discs

[sasquatch]

So I'm playing MGS4 last night and as the sequence with Big Momma is about to end (where snake gives her a gun), the games freezes and all of a sudden in the top left of the screen a question mark and then a disc symbol starts flashing and i can hear that PS3 slim making a funny sound as it tries to read the disc I guess.

Took the disc out, turn the unit off and on, tried other discs, no dice. When I put a game disc in the game does not come up for me to select on the main PS3 screen.

I wonder what happened? Luckily I have a 2 year protection plan with Best Buy so she'll be going there this weekend.