LinuxHardware.net: Information on hardware vendors providing Linux machines and other project news.
LinuxQuestions.org HCL: The LinuxQuestions.org Hardware Compatibility List allows users to see whether their hardware will work in Linux. Any member can add an entry and the HCL is free to use.
Mission Critical Linux: Core Analysis Suite - Self contained tool for crash dump or live system analysis. Kernel 2.2.5 Core Dump 1.0 - Kernel extension enabling core dump capture.
Net Express: high-end Linux systems VAR, and they go to great lengths to tell the reader about why they choose the hardware they do
Taurus Linux Pages: Taurus Software and Consulting's Linux Pages are dedicated to providing information on running Linux with partictular hardware, like scanners, printers, modems. It is also the homepage of the Linux on JavaStation x86 piggyback port.
handhelds.org -- Home Page: The goal of Handhelds is to encourage and facilitate the creation of open source software for use on handheld and wearable computers.
x86-64 Linux: AMD supported site dedicated to porting GNU/Linux to new AMD x86-64 architecture. Eventually, you'll be able to download full Linux distributions for x86-64 from this site.