First off, there was never a heat issue with this notebook.
Had it been that bad, this model would have never made it out.
That whole misconception stemmed from a few people that posted their harsh opinions on something they didn't completely understand.
One of my co-workers owns this model [w/5400rpm drive] and is very satisfied with it.
He's a mechanical engineer major, and is one of pickiest peron's I know.
For him to be happy with this would assure me that around 95% of everyone would be more than pleased with this notebook.
The other 5% just complain about anything they can.
The reason for the 4200 switch was not heat, it was cost.
This was done across the board [not just W3].
After many complaints from us and a few other resellers, the ASUS Ensemble PM decided to change it back to 5400 on the US upcoming Core Duo models.
When I used his notebook for a while on business trips, I was very happy with it.
Never did I experience any "hot spots" on while working on it for hours on end.
Yes, hot air comes out the vent... that's the most any mechanical/thermal engineer could ask for.
That means that the notebook is cool, because the hot air is being passed out.
This is what most people were complaining about, which is just plain stupid.
Sorry for the long post, but I wanted to make my point as clear as possible.
Thanks for listening.