If you look at the patent for the Virtual Console, one of the drawings specifically mentions Mario RPG. That's pretty encouraging, especially with Nintendo and Square getting back together again. It's also been rumored for a while now that you'll be able to download VC games to a DS. Ideally, there'd be some way to save it onto a blank cartridge or something, but I doubt it. Still, there's a pretty good chance you'll be able to play SMRPG on a DS before too long, and I've seen SNESs on eBay for more than the $330 for a Wii and DS.