History Channel HD has launched on DISH Network satellite, joining the likes of HGTV HD, Food Network HD, A&E HD, high-def simulcasts of Animal Planet and The Science Channel, and more than 30 other HD offerings.
In addition, Turner says as of Sept. 1 it has officially “made available” TBS HD and CNN HD, though it’s hard finding any provider carrying these new companion channels to long-established TNT HD. (All three are simulcast “mirrors” of the regular standard-def offerings.)
Satellite competitor DirecTV has previously announced it plans to offer many more HD channels with the recent launch of additional satellite capacity. Among the channels reported to be going HD on DirecTV later this fall: ABC Family, Bravo, Cartoon Network, FX, Sci Fi and USA.
Online’s AVS Forum keeps track of HD offerings here.

