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There are tons of foreign TV channel apps on the AppStore, and limited selection for US live TV. I think ESPN has one. If you're interested in going this route, I can recommend a SlingBox to use with your iPhone. I use mine all the time. All. The. Time. Stream to my iPhone and Macbook without any issues. Worth a look if you want to spend some money and have a box at home that you don't mind using while you're not home.
 
I second the slingbox. It gives you your home TV on-the-go. I luckily have an unlimited plan. I got the sling box after they allowed 3G streaming. It is a lifesaver for baseball games.
 
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