This information is located at http://ww2.cox.com/residential/oklahomacity/tv/channel-lineup.cox#14 when you press the Print this lineup (PDF) button.
Apparently on October 27th the following new HD channels will be activated:
719--ESPN News HD
751--Fuse HD
764--WE HD
773--Disney XD HD
813--Starz Edge HD
By my count this will bring the Cox Cable HD channel total to the mid-70s (plus the HD On Demand Over 450 HD "Choices")