Just FYI, Knoppix includes non-free software. Because of this policy IFSO shouldn't be pushing Knoppix over Morphix (if my information on Knoppix is wrong, please correct me).
Knoppix indeed includes proprietary software, but a free software knoppix exists: http://live-gnu-linux.infodrom.org/
Morphix contains trace elements of proprietary software (nvidious drivers), and it has MPlayer which is legally cloudy for some reason, but it has a "morphable" configuration which makes it possible to remove the proprietary traces.
Also, just now I've noticed there is a live GNU/Linux for media activists: http://dynebolic.org/