The Linux Foundation just announced that they have found a solution for the new BIOS of the upcoming Windows 8 PC. In short, if you are to purchase a Windows 8 PC in the near future, you will be able to install your favorite Linux distro on it.
Some big names in the Linux world like Ubuntu, Fedora and SUSE have worked out their own solutions but it may not help anything if you are not a user of these distros. That's why it is a really good news for all Linux users when the Linux Foundation has developed a system that will let you install most open source operating systems on most computers with Secure Boot enabled.
Basically, the Linux Foundation will pick up a license key from Microsoft, and then sign a pre-bootloader tool. This will let you chain load additional software without running another signature check.
In other words, the pre-bootloader will be signed, but anything you run after that doesn’t have to be. Effectively this kills any security benefits you get from Secure Boot in the first place, because it’s a way to run unsigned code.
For now you can check out the source code provided in the announcement of the Linux Foundation. Until the Linux Foundation actually obtains a key from Microsoft though, you won’t be able to do much with the code.