Are BDUs carrying the load on letting the public know what's coming? No, BDUs aren't involved at all. It's being left up to the over-the-air broadcasters, but most of them are now owned by BDUs. If they really were independent broadcasters, you would think that they would be highly motivated to let you know where to find their channel after the transition and to make sure they're on air; that doesn't apply anymore, because the BDUs own them.
On March 2nd, 2011. See this statement in context.