I had this idea some time ago
here, and it worked out rather well. Some people have suggested I run the thread again, so, I'm bringing it back. In good Ask Me fashion, I'll be around for the next 1.5 hours or so to field all the questions you have, then I'll review tomorrow afternoon and catch up on the more important ones that I missed.
Now, I know a LOT about NES/SNES/Genesis/Playstation/N64/Dreamcast, and a good amount about XBox/PS2 and newer (but not too much more than a serious hobbyist).
I also know a significant amount about coin-op machines, having run a few arcades (read: Not "I worked a minwage changemaking job") in my time.
So, coin-op questions are preferred, but I'll take old console questions too. My knowledge of Atari is somewhat on the weak side, but anything Nintendo/Genesis era is fair game.
Have at it!