Hi Craig,
just wanted to mention that there is a new open-source solution
available that now also enables asynchronous, row-based, master-master
replication of PostgreSQL databases.
Name: rubyrep
Project website with full feature list, step-by-step tutorial and
screencast (from zero to running replication in under 5 minutes)
available here:
http://www.rubyrep.org
Best Regards,
Arndt Lehmann