It's sad. The SNES or NES games aren't even made anymore... they should at least allow the ones no longer made to be utterly legal...
Of course, emulation of those games is in itself totally legal. Of course, you have to delete the game within 24 hours to comply with that. Or if you already own the game.
As for a good site to find that... I suggest what afex told yeh. To be on the Edge, you need good Emulation, eh? Definitely go to Google and search for what was stated above and you should find it.