Building hardware-based security with a Trusted Platform Module (TPM)

Let me translate from Microsoftese to English:

"Secure Boot prevents running an unknown OS loader" translates to "Muahahahaha!!! Take that, you Linux lusers! No more freedom for you lot!"

Is (E)LILO or GRUB considered to be a "verified OS loader" ?
How do I boot Linux with secure booting?

So if I have ripping software, debuggers, decompilers or reverse engineering software installed on my system, then the "attestation service" will deem my system to not be "secure" ?

I want to have ownership of the TPM.
I do NOT want Microsoft or any OEM to have ownership of the TPM.

NOTE TO HARDWARE VENDORS:

I am in charge of buying hardware at my (small) company. We buy several tens of thousands of dollars of PC hardware per year... not a lot in the big scheme of things, but a lot for a small company.

We will UNDER NO CIRCUMSTANCES purchase any hardware that does not allow us to install Linux. So those hardware vendors who want to be Windows 8 compliant, think very carefully. If you don't provide a way to disable bootloader verification or allow end-users to insert their own verification keys, you will not get our business.

I encourage anyone else in this position to post here.

Hands of my hardware.

If there is an option to install keys of the owner's choice, and remove default keys (Microsoft's key will become a prime target for mafias and rogue states), this is a minor but welcome security improvement. If not, it's a reason to spend your money somewhere else.

Seriously, y'all. YOU own your own TPM. Not MSFT, not OEM. YOU set it up and provision it the way you want. You decide what sw is acceptable to you. This is a terrific step forward for PC security.