I am a frequent customer of geeks.com. They sell computer hardware, and a bit of software, and some random electronic crap thrown in for good measure - some of which is pretty exciting. My latest purchase was a 3.5" USB 2.0/IEEE 1394 FireWire Aluminum Ext Hard Drive Case which is a cute little shiny aluminum number. Unfortunately, it has a heat problem and shuts down after a couple of minutes.
I called up geeks.com and after spending an awfully long time on hold I got to talk to a person. Then I spent an even longer time on hold, getting more and more frustrated - then I got to talk to another person, who is shipping me a replacement without hassle, and I don't even have to send the old one back because it's such a cheap item.
The last hardware failure I had was a PC power supply, which was also replaced without sending anything back, and with a higher-wattage model. These guys are great! I buy from them even when they're not the cheapest for reasons like these.