Today, Canonical reacted on the matter in their
latest blog post today.
If you don't feel like reading it all, here's the gist of it:
Canonical and Red Hat published a common white paper where they salute the UEFI norm. BIOS is old and outdated and the new norm is "a good step forward".
They obviously commented on the "Secure Boot" issue saying that it's a great security feature, as long as it gives user control and not restrict them.
The way it works is that Secure Boot would only allow "trusted software" to run. The whole issue is who gets to decide what is "trusted". Is it the user or the manufacturer?