Wii developers Dimok and giantpune have released the Wii System Menu Player version 0.1. This gives you an alternative menu to use for your Wii and utilizes the original files from the system menue. Right now navigation is working but game and homebrew are not starting. See the release notes below for further details.

"The Wii System Menu Player (a.k.a. mitschwanzenegger) is a reconstruct of the System Menu with the original resource files of the System Menu. It loads the resource and animation files from the NAND and replicates the behaviour of the System Menu.

Features

Use and demonstration of the Wii animation and layout system (brlan/brlyt)
Main system menu layout
Settings menu layout
Home menu layout
Game saves menu layout
Channel edit menu layout
Full screen animation banners
Icon animation banners
Several system animation banners (e.g. disc/gc channel)
Gamecube/Classic/WiiMote controller support
Playing ".bnr" and ".app" files from "sd:/banners/" (e.g. game opening.bnr)
Widescreen detection
Language detection"

Source: http://wiibrew.org/wiki/WiiSystemMenuPlayer

Official Site: http://code.google.com/p/wii-system-menu-player