Check out the 2012 GURIEC National Video Interpreting Symposium which lists some presentations about VRI. These links show the YouTube presentations but many of these also have PowerPoint presentations in a separate link.
Scroll down to 2012 National Video Interpreting Symposium to find these presentations I listed below.
A Study of VRI Mediated Interaction in Australia
PowerPoint-Part 1
What if the TV Really is Talking to Me? VRI in Mental Health Settings
PowerPoint Presentation
Consumers and VRI
PowerPoint Presentation
VRI Best Practices
PowerPoint Presentation
Interpreting via VRI in the Medical Setting
PowerPoint Presentation
Inova Health System and VRI
PowerPoint Presentation
Sample Articles
Mediated Communication in Context: Narrative Approaches to Understanding Encounters between Health Care Providers and Deaf People
More than Signing: Communicating with the Deaf
Computer Assisted Communication for the Hearing Impaired for an Emergency Room Scenario