I've been doing some research on boot2 and Bootmii in order to help design a PC tool which can detect the boot1 and boot2 versions from a NAND dump. During this process I've found that uninstalling Bootmii using the Hackmii installer deletes the Bootmii ARM code but actually leaves the fake signature behind. This proves that Nintendo would be able to detect Bootmii was once installed on the console. See the three examples below.
1.) Boot2 - Stock (Bootmii never installed)
Updated 01-23-2011 at 05:42 PM by streamlinehd