Yes they work.
I have played a gripton of emu games on my triumph. I play ocarina of time using the wii+nunchuck and I also use my dualshock from time to time. Make sure if you are on stock to get the umph kernel to overclock your phone(don't overclock it too much, I usually go for 1.3-1.5) when you are using n64oid. If you're on CM7 grab isaac's kernel... I have yet to try the psx emulator... I'm going to download some psx games tommorrow and try some ps1 classics and see how that works out. Starfox however was streaming not bad actually, almost no lag, but sometimes an ocasional hiccup comes up, just pause and resume, if the screen freezes. Damn I digressed! YES PS3 CONTROLLERS (using the sixaxis app) AND THE WIIMOTE (using the wiimote controller app) ARE WORKING ON TRIUMPH!
However a while back I wanted to pair up 2 dualshocks on the n64oid but I could only pair one. Maybe by now this feature has been implented? I'm going to check this out tommorrow too.