Orbital:
http://www.gametrailers.com/player/40648.html
You control a white star and make him grow bigger by absorbing blue and gray stars. And so on. Here is a great review of it. It is amazing and one of the most unique games you'll ever play.
Cubello:
http://www.gametrailers.com/player/41477.html
This game is not a remake and is an original title. You shoot colored cubes at an object called Cubello. You try to match four cubes in a row and the object is to get rid of all the cubes on the cubello.
Rotohex:
This is kind of hard to explain i think gameplay will do the best:
http://www.youtube.com/watch?v=JwUDdeFZphY
The Future Of Art Style:
There are currently two titles in the work for DSiWare. These are Art Style: DECODE and Art Style: AQUARIO. I'm very excited for these