http://www.youtube.com/watch?v=7-U9RAYMBjs
This is a game I've been working on since leaving the world of big budget games and founding Golden Hammer Software. We use l3dt for the map generation, mostly in the 3d heightfield editor with l3dt making the textures for us. It's in my own custom engine that I've been working on forever.
We should be submitting to the app store later this week.