Well, we did not get the message up here either on a 750 Mhz system (so I assume nobody off the Rohnert Park head end received it). (Unless my better half deleted it without telling me which I doubt extremely-- but I'll ask her to make sure.)
It's screwy how the messages sometimes show up and sometimes don't, and there is no consistency about which areas don't get them and when. Seems very disorganized.
However, I think Comcast pays TV Guide for each message sent, the amount depending on the number of subscribers receiviing it. So maybe that explains why nobody gets all the messages all the time.
Perhaps the "great message sender in the sky" (in Denver) decides which head ends he'll send the messages to based on the type of morning he's having.
Anyway, just to get a message announcing a new but unexpected HD channel is out of the ordinary and a good thing, regardless of the fact that most of us did not receive it.
Maybe they figured they'd send it to one head end only and the Avsforum members there would quickly spread the news and they'd save some greenbacks.