The port is playable with sound and both joysticks available. Source and binaries can be downloaded from
http://frodo-wii.googlecode.com and the wiibrew wiki has some more usage instructions at
http://wiibrew.org/wiki/Frodo
It has only been tested in 480i mode on a PAL TV (the 50Hz mode gives me a headache), and there are some sound glitches and probably some other minor bugs.
Usage
Put .t64 or .d64 files in /apps/
frodo/images on your SD card. The in-game menu allows you to insert disks/tapes, load them and configure the display, joystick ports etc. Saves will be stored on the SD card and the preferences are stored persistently. Wiimote 1 is by default the joystick in port 1 and wiimote 2 the joystick in port 2, but you can swap this.
v2 new
The main improvements are:
Slightly faster emulation speed
Improved keybindings to the controllers (more keys, also works more like a real keyboard)
Support for the classic controller (although this is untested since I don´t have the hardware)
Support for loading .prg, .p00 and .s00 files. Only .prg tested.
Misc smaller bugs have been fixed
Untar the binary archive on your SD card to install. Note that there are some new helper files/dirs compared to the first release, so simply copying boot.dol is not enough.
V3 Whats New
I´ve released version 3, which fixes the embarassing classic controller problem and some other issues. I simply went and bought one and tested it, and not everything worked as I thought

(Thanks also to the various people who reported problems with the classic controller)
A note about the speed: I´ve fiddled a bit more with that here, and the issue is (obviously) not that the Wii is too slow to emulate a C64. I think SDL_GetTicks() and/or SDL_Delay() behaves strange somehow, so I´ve replaced that particular part of the implementation. Speed is also configurable now
v4
Merged with the
Frodo trunk and build the "SC" version. This should improve emulation somewhat (although there are cases where it´s the other way around!). The palette also changes because of this.
Save prefrences together with the C64 state when saving snapshots. This is useful e.g., to have game-specific keybindings
More menu options to type common key sequences, turn on 1541 CPU emulation etc
Link with Yohanes version of SDL-Port, which perhaps brings USB keyboard support. I haven´t tested, so please test and fix the code.
Fixed some key binding bugs
Misc smaller improvements here and there
v5
Fixed a truly embarassing bug with the HOME button on the wiimote. Unfortunately,
... It no longer links with Yohanes
SDL version, which for some reason broke the menu code with the wiimote (but not the classic controller!). It´s probably unrelated but I can´t have it like that. Further investigation pending.