Overview

The Envers project aims to enable easy auditing of persistent classes.

Docs are available here
http://envers.bitbucket.org

Send user questions to NH user group list
http://groups.google.com/group/nhusers

Report bugs and/or patches with unit tests here 
http://nhibernate.jira.com/browse/NHE 

Available as a nuget package
http://nuget.org/packages/NHibernate.Envers