Demiforce, known for their high quality Gameboy Color homebrew Drymouth ( http://www.pdroms.de/files/420/ ) are working on an iPhone homebrew called Trism.
It’s a puzzler and a demo video has been published on Youtube. Check it out and lets hope for a public release soon.
AEP-Emu (DE/EN)
DMG Page (DE)
Indie Retro News (EN)
Retroguru (EN)