The printing business, the military, any subject--it doesn't matter. The collective knowledge/expertise of 100,000+ individuals will dwarf any news bureau or collection of political hacks. Not every poster knows, but someone will have the resources or know where it can be found in order to get to the truth.
Conversely, any misstatements, half-truths or misinformation will be challenged. It's the ultimate in freedom of the press.
You know, that is the number one reason I come to Free Republic twenty times a day. I don't care what the topic is, there is *someone* on FR who is literally a subject matter expert -- and they'll post on it, usually with links to other sites for more information. This is the promise of the internet being fulfilled.