this had happened to me/.... i had a 40 gb ps3 fat and i got it at launch.... i put skyrim on and played alittle bit and i got all the way to riverwood the first town and my ps3 just went black and i turned off the ps3 and back on and it restored the file data... that was 4 days ago but now i have a 320 gb ps3 slim and skyrim is the best game in the world (no problems and save file is 12.2MB ) i had an old character and the save was all the way up to 17.3MB but i deleted him because the game got boring.. ::
)) hopfully u invest and get a new ps3 or just a xbox360

After speaking with Sony Support (a FANTASTIC organization, btw - easily the best customer service experience I've ever had), I found out that a trade-in program exists for launch PS3's that have died - opt to trade-in your old system, and they will send you a 160GB Slim for $99. According to the customer service guy I spoke to, this price covers the cost of shipping as well.
The other alternative is that they will "fix" your old model, which means shipping you a factory-certified one, for $129.
I was impressed by the trade-in program for the slim - seriously, I know it stinks having to pay ANY money to continue gaming, but it's a serious upgrade from my dead launch system for one that's better in every way (except BC).
I only wish i didn't have to give up my old system in the process; I would've like to have honored it somehow.