Again a good documentation here http://dev.day.com/docs/en/cq/current/deploying/configuring_cq/replication.html#Replicating from Publish to Author

You could also check http://dev.day.com/content/kb/home/cq5/Development/HowToUseReverseReplication.html

Some of the configuration I would like to mention here is,

Default reverse replication time is 30 seconds. And this is not configurable.

if you want node with cq:distribute should get reverse replicated, You have to make sure that cq:distribute trigget is checked for reverse replication agent on publish (agent.publish)




Data under /content/usergenerated and of type cq:Comment get reverse replicated automatically. For all other you need to set reverse replication launcher. For one example you can refer http://www.adobewem.com/2011/10/how-to-set-up-usergroupprofile-reverse.html