Wack0 has released WiiSCU 0.21 :

WiiSCU by Wack0 (mod of IOS51+shop by tona) - powered by PatchMii. The application gives you the option to install new versions of channels and IOSes without touching the system menu.

Changelog
0.21:

~ Added code for debug purposes.
~ No more 'epic fail' -- now it shows what patchmii returns.
~ IOS51 and Photo Channel 1.0 support removed.
~ Added an option to exit to the Homebrew Channel.
~ News/weather channel now installs HAFx/HAGx as well as
HAFA/HAGA (using gamedisc region).
~ Added sysconf.c to determine region to install news/weather
channels.
~ Tidied up code a bit.

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