In my experience, I was up in the mountains of Montana with only a satellite connection and no cell service what so ever. You are only allowed so much data on them during the day but after 1 am I believe it is free until I think 7am... Anyway, my experience with it was that I could connect but nothing would rez and if i dared to go to a event.. instant crash..
So, yes you can run SL however it will eat up your data allotment and you will be VERY, VERY slow to load and lag horribly.
This is from personal experience with hughesnet