file output via trigger/queue

I am in a similar situation described by this thread:
http://www.mail-archive.com/pgsql-general@postgresql.org/msg78604.html

I need to write a few xml files to be consumed by a vendor application
in real-time.  The queue / (poll/cronjob) seems simple enough.

Before I commit I just wondered if anyone else had gone down this road
before.  Perhaps with a solution more like:
http://lethargy.org/~jesus/writes/pg_amqp-slides-from-pgeast2010.

Feedback appreciated.

Thanks,
Whit