Torvalds doesnt think Microsofts spin on Windows 8 UEFI secure boot is really going to do for security. The real problem, I feel, is that clever hackers will bypass the whole key issue either by getting a key of their own (how many of those private keys have stayed really private again? Oh, thats right, pretty much none of them) or theyll just take advantage of security bugs in signed software to bypass it without a key at all.
If so, then just simply disable the thing to remove the issue and fogetaboutit. That's my plan.
Linux has not experienced similar security issues that face Microsoft & Windows. The whole thing is another Microsoft 'restraint-of-trade/competition' scam. Don't let MS put their own Windows fears into Linux users.