There are three major modifications to the workshop activity.
*Team Mode, allowing teams/groups to submit assignments for peer review by individual members of other teams/groups within the course (there are plans for further modification, allowing team to team review);
*CSV Allocation Upload, allowing instructors to create a spreadsheet of students and staff to be assigned as reviewers within activities, and;
*Reviewer Calibration/Rating, allowing instructors to rate the expertise of students in marking by having them mark samples assignments, which the instructor has already determined how the samples should be marked

Code can be found at: https://github.com/gormster/moodle/tree/MOODLE_23_STABLE_workshop

A paper on the use of these tools in a course cab be found at:
http://www.ascilite.org.au/conferences/wellington12/2012/images/custom/cox%2c_julian_moodle.pdf