Dear DanyB,
The fan is quieter than my desktop tower, and is lower pitched. Actually, it is more "white noise," where the tower is more of a hum. One might notice it more because it is intermittent, rather than constant, which tends to make the noise unnoticeable after a while. Recording it would be rather useless, since the volume would be dependent on your speaker volume. Comparing it to the CDROM spinning is pretty accurate, although I have two CDROMs on my desktop, and one is louder than the other. I think anything that I could compare it to is relative (my car vent fan set to low, my central air when it kicks on, etc.) and not likely to help you. I know that I don't find it at all obtrusive.
I think that the bottom of the lappy gets mighty toasty sometimes, particularly when I'm installing programs with multiple CDs. It hasn't been a problem at all, because I usually have several layers of clothes, if not blankets (the house is chilly) in between the lappy and me, but come July, I'm thinking maybe I'll get one of the bed desks from Costco. I don't know how ergonomically correct they are, but its better than getting a first degree burn. Besides, the top of the desk does tilt up, which should please LeeT, who wanted the keyboard to have the option to slant. I find the flat position more comfortable. I think the keyboard is well designed, with a good place to rest my wrists, and the touch pad ideally located to move the cursor with the bases of my thumbs without even taking my fingers from the keys.