A couple of years back my MacBook Pro started having bad graphics artifact problems compounded by overheating - it looked like the graphics chip was going to bite it any day. I called Apple, and I shit you not, within twenty-five minutes of picking up the phone, I had received authorization to get it replaced. Not only that, they were going to replace my 2 year-old non-unibody MBP with one of the (at the time) brand-spankin' new unibodies.
Since the MBP was pretty heavily customized, I couldn't go get it swapped at an Apple Store, they wanted me to send it in. When I balked about the downtime, they simply shipped the replacement machine out to me and let me return the old one once I got it.
Now that's customer service.
And before someone makes the argument that Apple sells extremely high-margin items and thus can afford good customer service... HTC sells the same type of product at the same price points. Not only that, I've consistently gotten great customer service from Amazon, who is decidedly a very low margin business.