Postgres Jsonb has committed!
obartunov.livejournal.com/177247.html
What Jamie wrote
Very cool development!
I hope all database people understand, what that project mean for PostgreSQL - 99.9% percent of projects don't need MongoDB and could be nicely implemented in relational model. Now, PostgreSQL (AFAIK, the first considerable RDBMS) introduced the real support for semi-structured data, which are common in nowaday world.