You can use a United States proxy from http://www.proxy4free.com/page1.html.
(Example Firefox: Tools -> Options -> Conection Settings-> Manual Proxy Config. -> HTTP: 216.12.200.106 Port: 3128)
I'm from Spain and I had tested with Lost (just episode 220 available) and Alias (Episodes 501-512) with no problems
Slashdot Mirror
I'm not sure about it but the list is a "free proxy list" (and anonymous)
You can use a United States proxy from http://www.proxy4free.com/page1.html. (Example Firefox: Tools -> Options -> Conection Settings-> Manual Proxy Config. -> HTTP: 216.12.200.106 Port: 3128) I'm from Spain and I had tested with Lost (just episode 220 available) and Alias (Episodes 501-512) with no problems