JBoss.orgCommunity Documentation
If you run into trouble don't hesitate to get in touch with us:
JIRA Issue Tracking: https://jira.jboss.org/jira/browse/ERRAI
User Forum: http://community.jboss.org/en/errai?view=discussions
Mailing List: http://jboss.org/errai/MailingLists.html