Re: I got HD today! :) :)
The HD box is no extra cost, though I got the HD DVR so the DVR service costs $8.95 a month. With just the box I get cbs, nbc, fox, abc, iptv, espn, espn2, discovery, hbo, sho, max, starz, and tmc all in HD at no extra charge. With the premiums you have to subscribe to that particular premium package in order to get them.
Mediacoms HD package includes Univeral HD, HDnet 1 and 2, and mojo. They charge 9.95 a month for that.