From Satellite TV News :
Comcast is now expanding its high-definition channels in several markets in order to keep pace with satcasters DirecTV and Dish Network. Dish Network has announced the addition of
Comcast To Add Three HD channels

From Todays News..
Cox Communication has added Six New high-definition channels in Greater Louisiana area. Cox Communication Subscribers are delivered with following channels from 3rd June
Cox Adds Six HD channels