There's a very fast Super-Nintendo emulator for GP2X (which uses a similar CPU to the nokia tablets).

DrPocketSNES is a fullspeed SNES emulator. Reesy combined the current SquidgeSNES with the renderer of PocketSNES and now we've got an SNES Emulator that runs most games fullspeed (with some framskip) with sound at 250 MHz - INCLUDING transparencies and partial SuperFX chip support!

http://reesy.gp32x.de/DrPocketSnes.html
http://wiki.gp2x.org/wiki/DrPocketSNES

AFAICT it should be possible to port, but it does need some work.

It writes to gp2x framebuffer directly, so this would need to be changed to render to SDL, or to framebuffer using the mplayer framebuffer hack.

A few other minor changes are also necessary. This would be the non-plus-ultra emulator for the N770 and N800, IMHO.

I've made some progress but it's ... it might be beyond me.

So this is a call to interested parties. I can share my partial results if anyone wants (it's a mess atm).

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(edit: links to other ARM-Optimized snes emulators, possibly slower)

http://notaz.atspace.com/snes9x_uiq.html
http://yoyofr92.free.fr/os9xgp/index.html
cheers