great stuff. Rong told me he’s done some work with Hibernate at school and knows the library. My idea is to introduce additional layer of abscraction over RbInterface which makes use of NHibernate, so that if we migrate to some other database in future, the code won’t need to change much. I just need to know if we can hook it to RbInterface and how?

You might to take a look at the NHibernate generator that comes with GenWise Studio. It will create all needed mapping, poco and factory files from your existing database.