Cooling:

This is a place where Intel is far and away way superior to AMD. Of course, as they are a much larger company Intel can hire more dedicated engineers to design cooling solutions for their CPU's - but have you actually looked at the heatsink/fan's that come with retail boxed P4's and AMD processors?
The retail Intel heatsink is just designed so well. Not only does it have a massive amount of surface area to draw away the heat a P4 produces (highly clocked P4's can generate close to what high end AMD CPU's do), it also acts as a huge EMI shield! They're so good that even enthusiasts are using them to cool their overclocked processors! Another nice thing is just how quiet the fan is. In an enclosed case it's often almost impossible to hear it.
AMD could learn a thing or two from Intel on this, of course though I do understand that AMD is much smaller and cannot devote their engineer's time to designing better thermal solutions. They're moving in the right direction though, from those cheap generic heatsinks to Skive based models, to now requiring heatsinks to have a copper base in order to get AMD approval.
One problem AMD has is actually not their fault. If you go to your local "mom and pop" computer store look at the AMD based systems they have on sale. Often hidden away in the specifications is the CPU cooler. You're more likely to get an OEM AMD CPU rather then a retail one because OEM's are usually quite a bit cheaper so what they do is just slap on some generic cooler like the Thermaltake Volcano 6+ (I chose this cooler because a few of the local stores I frequent use this heatsink because of its low price). Most of these shops also include secondary fans to help keep things cool and again another fan add's to the decibel level.
Another point to keep in mind is how fragile the AMD CPU is. When's the last time you heard of someone that killed a P4 or P3 with heat? Or maybe having a heatsink crush the core? Now think about the horror stories you've heard about from AMD based processors... I know I remember !