Esri/100-lines-or-less-js — pull request #50 by leggetter (2013-03-26 11:07:30+00:00)
Title: Realtime Collaborative Map Editing

This submission to the 100-lines-or-less-js competition allow multiple users to simultaneously draw on a web map. You can also see this live here: http://www.leggetter.co.uk/gis/realtime-collaborative-mapping/#/

The README provides more information.