A few new things...
1.) ARM processors also have built-in system restriction features available
(DRM).
http://www.arm.com/products/processors/technologies/trustzone.php
PDF
http://infocenter.arm.com/help/topic/com.arm.doc.prd29-genc-009492c/PRD29-GENC-009492C_trustzone_security_whitepaper.pdf
2.) Since it apparently is ethically ok to use hardware as is, (Is there such
a thing as unethical hardware?) if ARM TrustZone is just another processor
mode, can such hardware be used along with free software code to ensure the
hardware DRM features for instance are turned off?
Can interacting with these features be used to keep things free rather than
locked down?
3.) I suppose there could be (are?) backdoors or secret keys in these trusted
features?
http://comments.gmane.org/gmane.comp.hardware.netbook.arm/7461
http://http://trisquel.info/en/forum/secret-3g-intel-chip-gives-snoops-backdoor-pc-access
4.) Also found this project to build a laptop.
http://rhombus-tech.net/community_ideas/laptop/
5.) Still looking into Loongson options.