Personal Democracy Forum (disclosure: a site for which I am a contributing editor) has just published a feature that profiles Markos as a sort of cyber- political boss. The article also describes how this site works and quotes a number of old-school political operatives who are uncomfortable with Kos's power and what they see as his unaccountability.
The article is linked with a teaser on the main PDF page and the permalink for the whole article below the fold is The Daily Kos: Political Machine 2.0
Apologies if this has already been diaried here. I didn't see it in the recent or recommended diaries and I think it's worth reading and discussing, either (or both) here or at the PDF site (which requires free registration, as it runs on Drupal).