Matt Taibbi is hardly what i would consider radical. Fact is he writes for Rolling Stone magazine, so he is mainstream.
I've been seeing him on cable TV for a few years as well, very practical and usually on the side of discussion i would agree with. In this latest issue of RS he's got a really good article on Health Care with some accompaning video too.
Here's the only clip i could find on the same subject that i could embed here, very worth checking out and forwarding. He may seem a bit harsh, but it's the fucking wake up call anyone having second thoughts about health care needs to listen to.