@Estel,

AFAIK multiboot is "just another preinit", so in a perfect world multiboot would be an add-on to the new and improved preinit.

So, NOLO -> [u-boot] -> kernel -> preinit -> [if configured] multiboot
and then [if maemo] -> maemo-specific preinit, with option for bootmenu

backupmenu-like could be integrated into this new multiboot, or with the maemo-specific bootmenu.

[ADD: everything can be implemented, relatively easily. All I can do now is throw ideas. Someday I might implement them. ]