Last one out, turn off the lights.
That was essentially the tone of the note that the HD DVD Promotional Group sent to its members Friday. The obituary for the format was short and to the point:

HD DVD Managing MembersMarch 28, 2008
The HD DVD Promotion Group was dissolved as of March 28, 2008, and the website was closed accordingly.
Please access to DVD Forum for HD DVD formats, and DVD Format/Logo Licensing Corporation for format books and its license. Regarding the HD DVD products, please contact each selling agency directly.
It was also a bit late. The battle between HD DVD and its nemesis format, Blu-ray, ended as soon as HD DVD's biggest backer, Toshiba, announced it would stop making HD DVD players. That was almost six weeks ago.
So, again, we bid adieu to a failed format. If you're finding it hard to let go, hit up your local Best Buy for some HD DVD titles. We hear they're desperate to get rid of them.