It seems that even though Apple rejected Yoot Saito's first attempt at an App Store game for being "unpleasant", Saito is ready for another go, but this time for the iPad. According to sketchy information from his blog in poorly machine translated Japanese, it appears The Tower iPad is coming soon.
Yoot Saito is Japanese game designer known for innovative game design. His first major game was SimTower and it's sequel Yoot Tower/The Tower II which was later remade for Gameboy Advance, and the Nintendo DS. Wikipedia describes the original SimTower:
SimTower: The Vertical Empire is a construction and management simulation computer game developed by OPeNBooK Co., Ltd. and published by Maxis for the Microsoft Windows and Mac OS 7 operating systems. It was released in November 1994 in the United States. The game allows players to build and manage a tower and decide what facilities to place in it, in order to ultimately build a five-star tower. Random events take place during play, such as terrorist acts that the player must respond to immediately.
Here's a video for The Tower DS (in Japanese):
And that's all we know so far. We'll keep an eye out for it, and hopefully we'll see an international (not just Japan) release.