I've been around, and in the few posts I've made I've seen people asking where to get Wii Isos, ROMs, etc.. Well, just for the heck of it, I'll post the sites I use to download the games, and if you have some you'd like to share, feel free to do so.

Wii iso:
Hippyfreak's Wii iso-only thread. Requires registration.
ESPALWii. It's Spanish, and requires registration.

Snes, Nes, Sega Genesis, N64 Roms, Psx iso, etc:
Vimm's Lair. Just go to "The Vault" section. (From Snes to Genesis)
Emuparadise Roms, Isos, games.. (Most consoles, even Nintendo Gamecube)
CoolROM.

Last resort? Google it!

That's about it, feel free to thank if you thought it was useful.