mvar writes "The Linux Foundation today released technical guidance to PC makers on how to implement secure UEFI without locking Linux or other free software off of new Windows 8 machines. The guidance included a subtle tisk-tisk at Microsoft's Steven Sinofsky for suggesting that PC owners won't want to mess with control of their hardware and would happily concede it to operating system makers and hardware manufacturers."
Canonical and Red Hat have also published a white paper
(PDF) suggesting that all OEMs "allow secure boot to be easily disabled and enabled through a
firmware configuration interface," among other things.