I only have Charter.
Your questions are valid and I am wanting to know whats out there because I am in a small market, and my investment isn't what I expected. Charter Cable in my area is not very knowledgeable (the 5 I've talked to on the phone, anyway) about hdtv. I've asked questions about cables, hook-ups, and programming and was told on every occcasion they would reply to me later and as of this day in time they haven't responded. Of course, I'm only a customer... <eyeroll>