Bought an 80GB phat PS3 and she's still running, no issues at all (knock on wood).
I replaced it's 80GB HDD to an 500GB 7200rpm HDD, but now I only have 10GB left XD
Its funny, I remember my PS3 heating up the table it was on so much it worried me, so I bought this passive aluminum laptop cooler stuck it on to an active 2 fan slim profile laptop cooler and after a couple of test runs it seemed to keep the base of the PS3 cooler. Right now my PS3 is fairly loud but I crank up my amp and the speakers drown out the fan sounds.
I also set the PS3 to auto turn off after 1 hour, so after a heavy gaming session I DON't turn off my PS3, instead I let it idle for that hour, so the internal temperature drops down closer to the average room temp before the auto timer turns it off.
Since heat is the enemy of electronics component, I figured I could extend their life by doing what I did and do above. So far so good (knock on wood)