Bitte installiert -wenn möglich!- keine Wii Updates mehr! Sowohl Datels Freeloader als auch der Trucha Signer können durch zukünftige Updates wirkungslos gemacht werden. Twilight-Hacks und Modchips sind allerdings nicht betroffen.
(via wiibrew.org)

On March 21st, Nintendo added a new version of the Wii firmware — IOS37 — to the Wii update servers. This version of the firmware has a fixed signature-checking function.
When a title (game, channel, etc) starts, it tells the system menu (using a field in the TMD) what version of the IOS it needs to run on — to support this, the Wii stores all previous firmware versions. (For most Wiis, this will be IOS9, IOS11, IOS13, IOS15, IOS17, IOS20, IOS21, IOS30, IOS31, IOS33, IOS34, IOS35, IOS36, and now IOS37).
As of March 22nd, no software uses IOS37 — the System Menu currently uses IOS30. An updated System Menu will likely use the new IOS37.
What does this mean?

• Until the system menu is updated to use IOS37, it will have no effect.

• Once the system menu is updated to use IOS37, “Trucha-Signed” discs — or channels — will stop working, as will the Freeloader disc.

• At that point, “homebrew channels” would be considered “invalid” by the system. The consequences of this are unclear, but that could potentially prevent the Wii from booting.

• Other versions of IOS are not affected.

• The Twilight Hack is unaffected.