I've an idea than can help people than can't use bootMii as boot2.
So, it's based on preloader. Actually, the preloader use an IOS (I don't know which IOS is used but it doesn't matter). So my idea is to create an IOS with the mini framework and use it with a new preloader.
Then, we can add an option to the preloader to launch directly bootMii without using the HBC.
So if we use that, we will have more security because the system won't use any classic ios (through the preloader or throught the HBC) to launch bootMii.