In a blog post, Canonical's VP of Professional & Engineering Services, Jon Melamut, has announced that the company now plans to use GRUB 2 for its UEFI Secure Boot implementation in the next version of Ubuntu, 12.10 "Quantal Quetzal". This is a change from earlier plans of using an EFILinux bootloader. Canonical had originally shied away from GRUB 2 among concerns that the software's GPLv3 licensing could force it or its OEMs to disclose the encryption keys used in securing the boot process.
In its most recent post, the company behind the popular Ubuntu Linux distribution now says that it is satisfied with the FSF's assurances and will use GRUB 2 in Ubuntu 12.10 and Ubuntu 12.04.2 LTS as its default bootloader.
However, the blog post does not mention how the company plans to address the possibility that its OEM partners might be compelled to divulge the Secure Boot keys as a result of the GPL.