You'll find a lot of debunking of pseudoscientific "theories" there, such as homeopathy, alternative medicine in general, conspiracy theories (9/11, HAARP, NWO/Illuminati) and other claims that are made in movies like "Thrive" (e.g. "free-energy-machines").
Related to the US-sceptics I also recommend Michael Shermer:
It's also good to check out the background of the people involved in movies like Thrive and the one posted in the first post.
A good site for this is www.esowatch.com (unfortunately, most articles are written in german) and google.com
You'll find that extremely often, those people don't have the scientific degress they claim to have. Or they bought their degrees from non-existing universities.