The pocketnester is about 3~4 times faster than original nesterce and many other NES emulators on Pocket PC. Most games run at about 30~50 FPS on a 200 MHz XScale device. That means you can get full speed emulation (60 FPS) with 206 MHz StrongARM/400 MHz XScale Pocket PCs."

Now we just need someone to compile it!

Here is the source!