Actually, 2 Harvest Moons. Or three.
It was announced some time ago. According to GS one is already out in the states, and one comes Q2.
This one: http://vgchartz.com/games/game.php?id=13721 comes in Q2, and is certain, all sites have it up, but the Feb 11th one is only at GS and one more, I believe that is because the Feb 11th one is only a GC port (I believe, not sure about that) http://vgchartz.com/games/game.php?id=6563
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS