signCheck is a homebrew application which does several checks on your wii's IOS. It can check if fakesigning (aka trucha bug) can be used, if nand, usb 2 ios tree or boot2 ios tree is accessible by each ios. At the end of the test it will output a .csv log named signCheck.csv to your sd card root.
0.3b - Fixed a little bug wich was leading to incorrect results on some ios (thanks Deviling Master for pointing this out).