WiiMU is a PoC “Channel Launcher” app for the Wii. It eventually aims to completely replace the System Menu in functionality. At the moment it is quite far from that goal, but it does have a start. It currently:
* Lists all installed Channels. (Does not include those with only a ticket)
* Allows selection of the Channel to load.
* Allows return to loader.
* Allows return to real System Menu.
* Has a NAND Dumper (Thanks to Redbird)
* Has a Main menu. Contains Launch a channel, dump NAND, return to Wii Menu, and return to Loader.

Please note that at the moment it DOES NOT REPLACE ANY SYSTEM FILES! It may eventually get to that point, but currently it is far from it.

Thanks to http://www.nintendomax.com for the news.