The sat is over Houston. Did speak with a technician from the company and from what I can remember, the lack of service had to do with the FCC, not the system itself. If you really want to know, I will ask again.
No, the sat is in an equatorial orbit at 101.2* longitude, which is over the Pacific and a couple hundred miles west of the Galapagos Islands.
Based on the signal footprint, there is coverage as you proceed southeast of Florida, but it falls off past the Bahamas and northern half of Cuba, and moreso over Hispanola, which is probably why the decision was made not to have it active for the SJU flights. You'd have the signal for the first part of the flight, just to have it fade out towards the end...
The same would happen trying to offer LiveTV to Hawaii, which might be one of the reasons none of the bigger carriers bought into it (why have a product you can't use on your longer flights?...).
With a bigger dish, the signal strength could be overcome (i.e. someone with a 2 meter dish can probably get a DirecTV signal in SJU just fine...), but I'm not so sure that is much of an option with the type of antenna used on aircraft...
[a href=http://www.dbstv.com/DIRECTV_Footprint.html target=_footprint]See the footprint[/a]