I only flipped channels a few minutes on TV last night and saw two segments on how "bloggers" are taking on big media and turning the world upside down.

From what I've seen, it's generally not individual "bloggers" who are making ripples. After all, most of them are not full-time investigative journalists. Instead, it's the community of web log readers working in a collaborative, open-source manner who are unearthing stories. That distinction often doesn't come across in the TV discussions.