If there is interest in a easy way to implement an HA database configuration and you don't mind pushing users to a MySQL based solution
We're using ActiveRecord to access our DB and shouldn't be doing anything specific to postgres.
This will need to be verified and tested, but a great feature to have in 0.4.0 would be to be able to use aeolus against postgres, mysql, or whatever other existing DB that a customer may have already deployed.
Furthermore, we can parametrize this in configure to allow a user to select which db to use.
-Mo