As continuing medical education (CME) moves toward continuing professional development (CPD), more emphasis is being placed on interactive interventions, including eCME. Within this environment, online CME is poised to grow off its already impressive base. Pri-Med's Physician Insights Study showed physicians had earned 13% of their hours online in the previous year -- a 63% increase since 2003. Most attached to their online blackboards: primary care physicians and psychiatrists. The case for eCME goes far beyond the convenience factor, often cited as the main driver of the medium's early growth. New formats have kept pace with technological advances, such as satellite radio, and even the ubiquity of Google.