April 14 2013
Google real time API http://t.co/lv8WdLZNsZ
April 14, 2013
Google Apps Developer Blog: Build collaborative apps with Google Drive Realtime API
Google Drive lets users create Docs, Sheets, and Slides, collaborate on them in real time, and have their changes saved instantly and automatically. With the new Google Drive Realtime API, you can now easily add the same real-time collaboration that powers Google Drive to your own apps.
http://googleappsdeveloper.blogspot.fr/2013/03/build-collaborative-apps-with-google.html?m=1