I've changed the direction for this project a little bit. I'll focus only on the enhanced package from now on. The first two posts of this thread have received a major overhaul. Please read "About this package" in the first post for some additional information.

Also, busybox-power can now be found in the repositories! A lot of work went into the install and uninstall script to make sure they behave well.
Mentalist Traceur & others: you don't have to worry about the package overwriting existing symlinks/applications. The package also keeps track of what symlinks it has installed, so it will never remove more symlinks than it has made

To all who have installed an older version (both the 'only updated' and enhanced binary): I recommend to revert to Nokia's original BusyBox (by executing "apt-get install --reinstall busybox"), and to remove any manually made symlinks to /bin/busybox prior to installing busybox-power. These recommendations aren't strictly necessary, but they prevent possible double symlinks and invalidating the backup of the original BusyBox binary (as the 'original' binary isn't original then).