You can download the emulator here.
Recent changes include:
- Reworked audio integration (resolves audio clipping and popping)
- Updated to latest versions of devkitPPC (r34) and libogc (1.8.23)
- Fixes to make wii7800 work with latest DevKit (arocchi)
- Fix bit shift overflow when reading cartridge size from header (clobber)
- Updates to internal ROM database (clobber)
- Correctly load supergame cart types (clobber)
For status updates, known issues, or to provide feedback please visit the Wii7800 forum thread.