I thought Microsoft had made it abundantly clear that it was backing HD DVD, but talk has surfaced in recent days of the company embracing Blu-ray, especially if it feels HD DVD isn’t catching on. No sir, that couldn’t be further from the truth:

We’re fully committed to HD-DVD and have absolutely no plans to support other optical formats…. Current reports indicating that Microsoft has a back-up plan which includes Blu-ray support are incorrect

Well there you go. In no uncertain terms, Microsoft will not be supporting Blu-ray. Not no way, not no how.

Clearing the Air: In Support of HD DVD… [Gamerscore Blog via GameIndustry.biz]