Peer Response (Duane Roen and Sherry Rankins-Robertson, in Teaching English: The Instructor's Resource Portal, requires free registration)
This resource is excellent for using peer response in the classroom. It provides both the research background and also practical instructional strategies to incorporating peer response, along with a bibliography and FAQ section.
Creating Effective Peer Response Workshops (Pamela Flash, Center for Writing, U of Minnesota)
This resource provides good information on what makes peer response workshops succeed or fail, along with down-to-earth guidelines on implementing peer response workshops.