The iPhone community is gung-ho about the various native applications being released without support from Apple in the form of SDK. After a Screenshot Capture utility, TUAW reports of another great entertainment utility: Nintendo NES Emulator.

Now you can play classic ROMs such as Super Mario Bros, Zelda or Mega Man on your iPhone. The controllers are displayed and mapped with virtual buttons on the touch screen itself. Still in nascent stage, the gameplay is very slow. An optimized version with poor graphics is also available.

ROMs need to be placed in /var/root/Media/ROMs/NES dierctory.

Download NES Emu for Apple iPhone here. A faster version with less graphics can be downloaded here.