This is the most recent Longhorn PR I've seen and I need to take it on face value unless proven otherwise. Lots of things seem to be happpening on the Trusted perimeter that I am unclear about e.g., Intel trusted platform, this Certicom development, and now a PR citing that TPM's are only optional for Longhorn. Meantime, can you help put my mind at ease by pointing me to the latest PR citing Longhorn requires TPM's? also, what are your comments re: Certicom? Although I may have missed it, I beleive I heard nothing from you on that. Thanks.