Voip is not out of the question. Personally I would not use it over satellite, but a lot of people are using voip on Exede and many no doubt plan to use it on Hughes' new service. It works.
I guess. I used to work on sats. The latency and priority access is the problem. It's sorta like using nextel though.There are many affordable cell programs out there for voice and text, so one doesn't have to go through that pain.