This is a picture of the Game Cube's memory card. It is called a Digicard. It will hold 4 megabits of information about .5 megs I believe. Nintendo is stating that transfer speed will be extremely quick.
This is a mini expanion for the Digicard and will increase the size to be about 64 megabits.
This is one of the bigger add-ons because it will eliminate the need of a chord. Instead of the regular wireless controllers which require a direct line of sight to the system, the Game Cube wireless controller uses an RF system and has a distance of about 10 meters
This is extremely important online gaming wise as it shows that Nintendo is dedicated to bringing online gaming to people with "slow" 56k modems.
This will allow gamers with DSL, cable, etc. connections to play games at blazing speeds.
This is a cable that is to be used for televisions that are equipped with HDTV and DTV.