Here’s their social media presence if anyone is feeling like they’d like to drop them a message:
https://www.facebook.com/HDMIForum/
https://twitter.com/HDMIForum/
https://www.facebook.com/HDMIForum/
https://twitter.com/HDMIForum/
(I was quite a bit less surprised that there was no real content in them)
(No relation, just the first thing that came to mind when I tried to think of an organization that I wouldn't expect to have much of a social media presence.)