I wonder if you can't be sued by sling for not allowing their app on an iphone while on your network, but you can with sling with other handhelds using AT&T.
I wish... but it's at&t's network, they can pull the plug on all of sling's apps on their network (Windows Mobile version, etc.). Not a plausible case. It looks like the cell carriers may see a bright future ahead for mobile TV after all (even though up until now evidence has shown most people don't want to watch TV on the go). So now it's a race to try to offer similar services by the carriers on all the networks. Much like how TiVo has lost the DVR war to cable and satellite providers.