The following links are sources of information and vendors:

1UP’s Arcade
Adafruit
All Electronics
Arcadeshop
Arcade Vector Graphics
AVRDude
AVR Freaks
Ben’s Hobby Corner
Bit-Tech
BYOAC
CNC Zone
AVR Fuse Calculator
Game on Grafix
Groovy Game Gear

Happ Controls (SuzoHapp)
KLOV (Killer List of Videogames)
Mame World
Marco Specialties
Math World
MCS Electronics
NUI Group
Objective Development
PCB Heaven
Romaxx CNC
Ultimarc