Tantric has released Snes9x GX 4.0.6, Snes Emulator for Wii and Gamecube:

Snes9x GX is a Super Nintendo™ / Super Famicom emulator for the Nintendo Wii.
Snes9x GX is a port of Snes9x 1.51 (http://snes9x.ipherswipsite.com). It was
originally ported by SoftDev for the GameCube, and has been worked on by
various authors. Development has since moved to the Wii, and the project is
currently being maintained by Tantric and michniewski.

Snes9x GX is a "homebrew application" which means you will need a way to run
unsigned code on your Nintendo Wii.

* Based on Snes9x 1.51 - superior ROM compatibility
* 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 (requires DVDx), SMB, GC Memory Card, 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!

[4.0.6 - May 30, 2009]

* Fixed SD/USB corruption bug
* SMB works again
* GUI bugs fixed, GUI behavioral improvements

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