Well, while this isn't free, my buddy did something that's a good idea for non-direct TV users.
Last year Direct TV had an offer where when you order NFL Sunday Ticket you get the dish, installation, and 3 months of premium service free.
So, he did it, got the dish and installation free, then after his 3 months of premium service were up he just cancelled the service. So he got the dish and installation free, and now has it so he can order Sunday Ticket every year.
They had the same offer again this year, so I'd imagine that it's an annual thing.