I absolutely would. I know someday my cartridge may break or something so having it on my Wii would be nice. It'd be even cooler if it was on the 3DS as well. I'd love to take it on road trips and stuff. I was thinking of using and R4 card to do this but I'm too lazy at the moment to attempt it.
SNES emulators on the DS aren't exactly the best emulators around. The closest I've seen is CATSFC for the Supercard DSTWO, and there's horrible input lag on that.
But anyways, I would gladly dump as much money as possible on any iteration of any Mother game on the Wii or 3DS, though I doubt it'll be on the Wii, as Nintendo's getting ready to roll out the Wii U.
A friend of mine, upon encountering his first enemy in EarthBound Zero wrote:
...I'm fighting a lamp?