I've worked on that and current live-initramfs in Grml provides a better way
with regards to logging functions, live-initramfs 2.x hopefully improves as
well. Closing this issue therefore.
I'm not really happy about the way live-initramfs realizes output redirection,
especially in quiet mode warning just aren't visible to the users. We should
investigate on that an make sure the user is notified about any possible
problem (currently I'm hacking around that using /dev/console).