HHH-4540 added support for java.util.Date revision timestamps, but I'd really like to use Joda Instants. The rest of my application uses them, and our Hibernate mapping looks like this:

<class name="foo" table="FOO">
  ...
  <property name="createdInstant" type="org.jadira.usertype.dateandtime.joda.PersistentInstantAsMillisLong">
      <column name="CREATED_INSTANT" sql-type="bigint"/>
  </property>
</class>

I don't know this magical stuff works, but ideally any time-like property that Hibernate supports ought to be supported in Envers as well.