Most exciting of all: Space Invaders Extreme 2 is on the way to the DS this fall. We aren't all going to have to import European copies! Space Bust-a-Move will precede it in stores, releasing on July 28.
In WiiWare, we can look forward to all the Taito games we've seen in Japan so far. Rainbow Islands: Towering Adventure! will be available for download on June 15. Bust-a-Move Plus!, which features 135 new levels and 270 levels from previous Bust-a-Moves as DLC, is expected later this summer, as is Arkanoid Plus!
We're looking forward to an all-Taito summer as we await the release of Space Invaders Extreme 2!