Homebrew coder The Lemon Man has released a new update for SignCheck, a homebrew application that is programmed to regularly check the IOS of your Nintendo Wii. The latest update is a bug fix release.
SignCheck can check if fakesigning (aka trucha bug) can be used, if nand, USB 2 IOS tree or boot2 IOS tree is accessible by that IOS. At the end of the test it will output a .csv log named signCheck.csv in the root of your SD card.
Download: SignCheck v0.3a