No need tripleposting.
Yes, it should be *feasible*. Java is crossplatform anyway, but there would be a
significant performance hit using it, even after a few months. The controls are also a significant issue. Good luck playing Street Fighter 2 with a stylus
The scene just bloomed. We just start to see homebrew apps, but in all cases, iPhone isn't very handy for emu gaming, if at all.
Check this
GUI Applications - The iPhone Dev Wiki