If you've been using Moodle for a few years, you'll most likely remember the very first contributed module, Workshop, a peer assessment activity.
The Workshop module was originally written by Ray Kingdon, though it's been largely unmaintained for a long time except for emergency fixes by various developers to keep it operational.
The good news is that the Workshop module is being completely rewritten for Moodle 2.0 by David Mudrák.
We'd really like feedback on the Workshop 2.0 specification before David starts coding. Please join our discussion in the Workshop module forum, Workshop 2.0 specification - request for review and comments.