I have contacted their corp. offices in the past, and it does help. It took less than a week for a lady at the local B'ham office to contact me about HD. If anybody would like to contact her here is the information:
phone# 205-443-3157 ask for Elaina Pickett
Be nice and she will find out all she can. She did not have a ton of immediate answers, but she contacted enough people for me to get my questions answered. Just FYI, last time I did talk with them, ESPNHD was asking for an extra $.25 per HD subscriber for their service to be with Charter. Don't know if they have come down from that yet. The local CBS station was still in negtiations with Charter, although that was about 4 months ago, and still no CBS(damnit). Anyway, good luck. Voicing our needs does work.