Support for PostgreSQL as a broker - gauge of interest

PostgreSQL has a LISTEN/NOTIFY mechanism which appears to be capable of implementing a message queue-like functionality (likely not all by itself, as it may require some supporting infrastructure in the form of a table of messages).

Is there any interest in using PostgreSQL as both a broker and a result store (which I believe is currently fully supported)? It looks attractive to me as it would reduce the number of different components in my system (ie why run redis/rabbitmq on the side, when I can store everything in my database).

CC: @xirdneh