I have an 80gb ps3. It's the one from the Metal Gear Solid 4 bundle that has software backward compatibility.
That fan goes nuts when I watch a blu-ray. It is quiet for the first few minutes and then goes full blast the rest of the time. It has plenty of room to vent too. It's sitting on a glass shelf with open sides and back on the cabinet. It just makes a loud wooshing sound the whole time.
I'm about 12ft from it and I have large tower speakers,center chanel,and sub and I can easily hear the fan going so it's not like it is just drowning out some tiny tv speakers or anything.
I'm wondering about the slim also.
I've heard the some ps3s were worse than others and the 80gb MGS4 package is one of the worst.
'01 Bullitt #0054