The reasons that this question gets asked over and over again are:
1) It is important for all of us who want more HD
2) The information is not STATIC, and it's not easy to find. Things change. Dish thought it would have had two sats up by now. As of today, it's really anyone's guess when either one will launch. I think March is way optimistic.
So give us all a break.
At this point, there are two satellites bought and paid for sittin in U-stor-it garages somewhere that ain't goin' nowhere anytime soon.
My prediction is that you won't see a signal from either one until August or September. I don't think there is a firm date for either one yet, that I can find.
If anyone knows any different, not would be the time to speak up and maybe we could put definitive updated information on a closed sticky thread. Maybe with the name of the satellite, where it's going, who's launching it and whether there is a date or not.