This document profiles "e-Patient Dave" deBronkart and his journey from being diagnosed with cancer in 2007 to becoming a prominent advocate for participatory medicine and empowering patients. It describes his early career in marketing and technology, how he turned to blogging and researching his condition online after his cancer diagnosis, and how he has since become a full-time speaker and advisor on issues of patient engagement and empowerment, publishing over 1400 blog posts and articles on the topic. It stresses the importance of patients being able to access and share health information online to become better informed and engaged in their own care.