Where to Buy - http://www.bifferos.com (http://bifferos.bizhat.com)
Mailing list - Chat with other users, report problems etc...
Subversion - Build kernel + rootfs from scratch
OpenWrt - Shipped with Bifferboard as standard - requires USB storage
Minimal Linux - Fit kernel + initrd entirely in 1MB Flash
'Desktop' Linux distributions - Run your favourite x86 Linux on Bifferboard
Hardware Specification - The chips involved
Bootloader - Features of the bootloader (Biffboot).
Linux Kernel Patches - The bleeding edge:  Getting the most from your Bifferboard
OpenWrt SVN - How to compile the latest version of OpenWrt
Kexec-based loader - A poor-man's kboot/kexec-loader