Ugh!!! They should have done that in the first place if you ask me. I know I for one would prefer the 65 nm over the current 90 nm if it meant less noise! I have the intercooler for it already and quit using it because it was too loud for my liking! Without it though, the 360 does run hott! But I have never had it freeze on me in gameplay.
Do note though that 3 months after having it, I did get a hardware failure, but that was my own fault. I had it in a compartment that had little air ventilation (XBOX seemed to work fine it, so I thought the 360 wouldn't have a problem ) and my g/f played it for 3 hours. Guess she fried something within the time span. But Microsoft got me back up and running in about week with all my data still intact! Since then, no problems.