According to the offical news that the first launch 3DS machines will be available in colors known as "cosmo Black "and "Aqua blue".
3DS Feature List :
* Backward compatible with DS and DSi games (including downloadables).
* Customizable 3D depth and 2D mode.
* SD Memory card slot, with a 2Gb card included.
* Familiar controls to DS users.
* Added analog circle pad.
* Accelerometer and Gyroscope allow for motion sensing.
* 3DS is packaged with a battery charging cradle.
* User interface has a Home button which allows for suspending gameplay and reentering at any time.
* Street Pass enhanced local wireless features.
* 3 cameras - one is forward facing for self shots. The other two allow for 3D photography.
3DS releated News :
1.3DS' secret AR games leaked.The six Nintendo 3DS Augmented Reality cards that come bundled with the new console include Mario, Link, Pikmin, Samus Aran and Kirby.please look at following picture :
2..the 3DS Will only use one universal friend code. that's to say, Once you add someone as a friend in the 3DS, you don't need to add him again in a game you both have.What's more, it will make WIFI games easier to set-up.
3.It's said that old DS-only flash carts (e.g. Acekard 2.1, CycloDS Evolution, R4 DS...) that were not DSi compatible, aren't 3DS compatible either.
4.the Nintendo 3DS will be region coded, that's to say the right of playing games from different regions on the system was lost.
Nintendo offical website
Nintendo 3DS FlashCard