Ezra's the closest I get to a one-man show. PoliticalWire.com has been doing a daily pulse on health care reform, but it's mixed in with general politics content, and even he's part of CQ now.
The "New Health Dialogue" blog at the New America Foundation is a good one. There are multiple authors, but all are nonpartisan, smart, wonky. Focus more on research, less on politics. http://www.newamerica.net/blog/health