The only emulator so far release is NES.app. It has the following features:

• Multitouch: Use the directional pad + A + B, or other combinations
• Landscape Mode: Turn the iPhone counter-clockwise to play in landscape mode
• Zapper Tap: Tap objects on the screen to shoot them
• Full Screen: Enlarge your NES picture to the max possible
• Save State: Save an instant snapshot of your game and come back to it later
• Game Genie: Use Game Genie cheat codes
• ... and many more

You can download it on the right.... or get it from Cydia...We will be updated our sources for Cydia shortly as well as have the latest updates to jailbreak your iphone quickly and easily on PC and MAC.