Breaking: the 3DS is compatible with the DSi and DSi XL power cable.
This is huge.
Also, 3DS game boxes are slimmer than DS game boxes. Repeat: your shelves haven't grown; your game boxes have been on a diet.
These tidbits come from a GoNintendo roundup. This also tells us the Street Pass feature - which talks to other 3DS owners while dormant in your pocket - can transfer data for up to 12 games at once!
Street Pass transfers happen on a fundamental system level but have parental controls to limit your kids' 3DS chatter capacity, apparently.
The 3DS also allows you to bring up the home menu and browse online or take notes while playing a game.
Japan will play Nintendo's 3DS first from 26th February. The West (and Australia) must wait until sometime in March.
The price: Ľ25,000 (converts to Ł190) - the most expensive DS yet.