We just upgraded our DirecTV system to the new HDTV dish and receiver for the downstairs set. The upstairs non-HDTV mirrored receiver is still conventional DirecTV and works fine with the new HDTV dish. Aside from the HDTV, the new oval-shaped dish with 3 LNB heads seems to have much better resistance to dropout in heavy rain.
Unfortunately, local conventional stations are still available over DirecTV, but local HDTV transmissions require an antenna. The antenna output is diplexed into the coax cable coming down from the dish and then splits back out at the HDTV receiver which shows the local HDTV stations on its channel menu along with the satellite stations. The HDTV picture quality and Dolby 5. 1 digital sound output (optical cable) to the home theater system are really nice!
Rusty