Hello,
finally, the Envers project is in a public SVN and has a JIRA project:
* http://anonsvn.jboss.org/repos/envers/trunk/
* http://jira.jboss.org/jira/browse/ENVERS
--
Adam
There's some more information on the source code, building and testing on this page:
http://www.jboss.org/envers/source.html
--
Adam