Take it as a sign: Stalker just Chernobyl'd your PS3. It wants to be played.
Anyways, Yes, I have had my PS3 YLOD on me as well, I was too lazy to send it off to Sony at first and it sat around for about two weeks before I sent it. got it back a week later. Then had to send it back again days later cause the HDMI audio didn't work.. But since then, all aces. It lastest roughly 4 years.
I highly suggest you get cracking on Shadow of Chernobyl while it's on vacation at the Sony Spa. Better yet, google "Oblivion Lost Mod" and attach it. Adds enemies, smarter AI, new armor sets, weapons, weapon skins, Omission storms that change everything, and a AfterMath mode that continues on from after you beat the story, you can join any faction (including military, bandits, and monolith (lolwut?)) and do missions for them.
I personally joined Monolith so I could run around the NPP and Pripyat without getting my ass handed to me