Things of note:
-One of the screens is touch sensitive like a PDA. In one demo, players guide a toddler-age Mario as he falls from the sky by drawing clouds. Other games give multiple views of the action.
-Each screen is 3 inches,
-Bluetooth wireless communication to link up with other DS's
-DS uses small cards, there's a separate slot for GBA cartridges.
-It has more processing power than the N64.