The Journal of Medical Internet Research is an excellent resource on all matters associated with eHealth. Based out of the Centre for Global eHealth Innovation in Toronto, Canada, the journal is an international scientific peer-reviewed journal on all aspects of research, information and communication in the healthcare field using Internet and Intranet-related technologies.
I personally was struck by two articles relevant to my eHealth risk and opportunity research: Design and Evaluation in eHealth: Challenges and Implications for an Interdisciplinary Field and Improving Information Technology Adoption and Implementation Through the Identification of Appropriate Benefits: Creating IMPROVE-IT.
All journal articles can be accessed in in HTML format for free. A paid membership fee is required if you want to download PDF files of articles.
This is a page worth bookmarking.