Arianna Huffinton said something interesting at FOCAS today about why we blog. The Huffington Post's model is that they pay their editors, but not their contributors. So why do the bloggers do it? Arianna said that people don't write New York Times Op Eds for the $150 - they do it for other reasons. The same is true for bloggers. Huffington Post bloggers get exposure, often resulting in commissioned work from news outlets, book deals, etc. The site is their platform, and it serves their needs better than traditional media (and, unlike regular news outlets, the contributors get to keep their copyright!).