[rhelv6-beta-list] Preload EL6 Workstation with LUKS Encrypted Drive - No Passphrase

[Grant Williamson]

  Here is the desired scenario.

Preinstalled customized EL6 on a Lenovo T400 on Luks encrypted drive.
/boot  - 500mb - non encrypted
/          - 50GB   - luks encrypted
swap   - 2GB     - luks encrypted
/home  -50 GB  - luks encrypted

On initial boot user is not prompted to enter a global passphrase.
Firstboot runs requests root password / user id / change global luks passphrase.

I can build a firstboot panel to add/change a luks passphrase, is there anyway to
pass a password from grub to unlock luks?