Well, it seems Rare will continue to develop for the DS. Since being bought out by Microsoft a few years ago they have put out a few GBA games and Diddy Kong Racing for the DS. Now they are bringing the Viva Pinata game to the DS. I have never played Viva Pinata myself, but from what I have read and seen, it looked like a truly unique game. It was well received by a lot of people. Not surprising since before Microsoft bought out Rare, they were primarily a Nintendo developer. So we should expect good things here.
But the most interesting aspect of this whole deal is that even though Rare is owned by Microsoft (For those of you who live in caves, Microsoft put out the xBox360, a competing console with the Nintendo Wii) they are allowed to continue to develop for other platforms. Odd indeed. Microsoft is not known for playing nicely with competitors. Perhaps they have an ace up their sleeve? Probably not, again Microsoft isn't known for it's obfuscation abilities.