1.4.0 [nervegas] Added HSyncs for overclocked situations (DMA, etc)
Added 512 clocks for DMA writes
Fixed vblank flag (set @ 240), rolling thunder levels fix
Fixed vblank end = scanline 261 (0-indexed)
Added support for player 2 controller (touch top gray bar)
[jordan] Added 8-step CPU cycle between IRQ and NMI
Moved CPU step to before sprite hit, fixed minor rendering
[nervegas] Added "mid-button hot spot" allowing both A/B to be pressed
by rolling the thumb from one button to the middle of both.
Note: You have to manually install this ATM, it is not showing up in the PXL repository nor Installer as of 10:30am PST.

http://iphone.natetrue.com/nesapp/
Also, BattleChess now works! Finally, something like what they were playing in Starwars
The P2 Controller allows you to play 2 player games that take turns, like Monopoly or Wheel of Fortune. The Keys will turn blue to let you know you're using player 2's controller.