FBZX is a ZX Spectrum emulator for FrameBuffer written by Sergio Costasand ported as FBZX Wii to Wii by Oibaf.

Main features:

* Emulates accurately the Original 48Kspectrum (both issue 2 and issue 3), the classic 128K, the Amstrad Plus 2, the Amstrad Plus 2A, the Spanish 128K and the NTSC 48k. This includes screen, keyboard and sound (both speaker and AY-3-8912 chip).
* Screen emulation is extremely accurate, so it can emulate border effects and even attribute effects.
* In precision mode floating bus and interrupt timing are accuratly emulated.
* Frambuffer resolution at 640X480 or 320X240.
* Supports Z80 snapshots, both loading and saving, and loading .SNA snapshots.
* Supports TAP (both read and write) and TZX (only read) tape files, supporting normal speed loading and instant loading.
* Tape browser.
* Supports POKE files.
* Supports ZIP files.
* FTP client for loading games from internet repositories (e.g. WOS).
* Emulates up to 2 joysticks of types: Kempston, Cursor, Fuller , Sinclair1, Sinclair2 and QAOP.
* All the wiimote, nunchuck and classic controller buttons and joypads are fully configurable.
* IR Virtual keyboard support.
* Emulates Interface I, Interface II and Microdrive.
* Emulates ULAPlus.
* Emulates Currah microspeech.
* Based in a new, fully free, Z80 emulator (Z80Free).

Changes:

* Added RZX support (play, record, add bookmark, edit, browsing) in tool menu
* Preview screen auto extracted from tap, tzx, sna, z80 and rzx files
* Left and right toggle preview windows
* Horizontally scrolling menu
* Last selected file remembered in the menu
* Extended z80 file format to +2, +3, +2a models
* Added AY info emulation in z80 file format
* Z80 file compression (v2.0) for both 48k and 128k models
* Fixed bug in z80 decompression algorithm

Thanks to Oibaf himself for the email letting us know about this update.

http://wiibrew.org/wiki/FBZX_Wii