I was told today (by CS) that HD was in development but that the picture quality on HD was lower than it currently is and therefore they were working on getting it better. This, obviously, is quite interesting, coz surely the point of HD is that it's better quality. Oh well.
More positively they did say that they are currently rolling out "games" and the interactive services (including red button) across exchanges at the moment and we would be notified when our particular exchange was affected. Hmm...