http://en.wikipedia.org/wiki/Voom_HD_Networks
Some interesting history here. Not exactly sure of the validity overall but it sounds about right.
Yes, you are correct.
http://forums.soundandvisionmag.com/showthread.php?249423-Voom-going-out-of-business
http://www.freerepublic.com/focus/chat/2946500/posts?page=26#26