Suse hardware database
Redhat hardware database
Mandrake hardware database
linuxhardware.net, Hardware knowledege through user experience
linux-usb.org, Linux USB hardware
Linux USB device DB
linuxprinting.org, Linux printer database
linux-laptop.net, Linux on Laptops, long list with different Laptop types
linuxdevices.com, The Embedded Linux Portal
Tommy's pinout collection
technick.net, General computer hardware info
Internet Hardware Book