Speaking of Databases - Has anyone here @ HN got a first/second hand experience migrating from Oracle 10G to PostgreSQL? Let's say migrating a multi node 10G R

Speaking of Databases - Has anyone here @ HN got a first/second hand experience migrating from Oracle 10G to PostgreSQL? Let's say migrating a multi node 10G RAC instance - what would I lose in terms of functionality - Distributed transactions, limitations on # of replicated nodes, RAT etc. Just curious how far it has come in terms of replacing Oracle.