I haven't read this whole thread, but ohwell
In terms of the backdoor idea, one Microsoft developer has confirmed that he won't do it. I believe he said, "over my dead body" (I just glanced over it at /.). Of course, that doesn't stop the corporation as a whole from doing it, but it doesn't seem likely.
I'm glad that Microsoft is training law enforcement on how the filesystem encryption works. I know that I've had to deal with encrypted harddrives in a forensic situation before. We had to decrypt them without modifying them, based on the user's password which we had. This could be an example of where the situation differs between what Sidoh and Metal are saying. We don't know how to BREAK the encryption, but we know how to work with it.