Tantric has released a new version of his Emulator for the Wii/Gamecube:

Snes9x GX is a Super Nintendo™ / Super Famicom emulator for the Nintendo Wii.
Snes9x GX is a port of Snes9x (http://www.snes9x.com).

Snes9x GX is a "homebrew application" which means you will need a way to run
unsigned code on your Nintendo Wii. The best website for getting started with
Wii homebrew is WiiBrew (www.wiibrew.org).

* Based on Snes9x 1.52
* Wiimote, Nunchuk, Classic, and Gamecube controller support
* SNES Superscope, Mouse, Justifier support
* Cheat support
* Auto Load/Save Game Snapshots and SRAM
* Custom controller configurations
* SD, USB, DVD, SMB, Zip, and 7z support
* Autodetect PAL/NTSC, 16:9 widescreen support
* Original/filtered/unfiltered video modes
* Turbo Mode - up to 2x the normal speed
* Zoom option to zoom in/out
* Open Source!

[4.1.8 - April 9, 2010]

* Fix auto-save bug

[4.1.7 - April 9, 2010]

* Freezing issue fixed
* Core timing fixes, should solve some problems with some games
* Most 3rd party controllers should work now (you're welcome!)
* 7z crash fixed
* GameCube only - DVD/SD Gecko fixed (thanks emukidid!)
* Translation updates (German and Dutch)
* Other minor changes

http://code.google.com/p/snes9x-gx/