From Reddit:
(This works with sites like Daily Show, Colbert Report, and South Park Studios but not Hulu)
This is an add-on plugin for Firefox and is called Modify Headers 0.6.6:
Open the application, and at the top bar change these:
1. Action (a drop down menu): Add
2. First box is for the name, input: X-Forwarded-For
3. Second box is for value, input: 12.13.14.15
4. Third box can be left blank.
5. Click enable.
Now that you've done this, you can view any American site (except for Hulu, grr). As long as it's enabled, you'll always be able to view the links on Reddit the Americans add without having to divert to somewhere else.