I know editing the com.apple.Boot.plist is mighty easy, but it would be even easier still if you could edit the file straight from chameleon's gui. not only edit the plist on the specific drive chameleon is installed on, but other drives.
you boot up and realize that you made a mistake last time you edited the plist, you can change what you screwed up without having to actually load an os. and I know you can edit things in single user mode, yet what if that is broken as well.
and having it be either text based editing, as well as like the bios configuration menu itself, would be cool. save from typing, just hit enter and scroll through the options. hell, even mouse support would be awesome for this, yet I doubt that can be squeezed in as well