I like the work MB does.
I've never been so up to date with what's coming on Virgin until I found this thread, and he's doing a great job.
As for the HD, it's just about waiting and being surprised.
Maybe the channel is a big surprise in what he knows, so he doesn't want to reveal it yet
It's not like it will be available straight away when it is announced, so you will have to wait anyway, and being that you know what it is, will probably make you more frustrated especially if you are looking forward to it :P
Just be patient. thats all i can say