I'm starting a new series (even though I'm in a middle of a bunch) called RetroGaming 101 where I just run down the basics of a given console to give them a quick head start.
I started with the Dreamcast:
http://www.racketboy.com/retro/2007/02/ ... guide.html
I think I hit most of the basics, but maybe I overlooked a helpful piece of information.
Feel free to contribute a sentence or paragraph to add to the piece.