I was pleased to read that cisco's MDS management software supports
having pg in the backend:
http://www.cisco.com/univercd/cc/td/doc/product/sn5000/mds9000/3_0/fmcfg/part01/gs.htm#wp521101
Supported Software
Databases
Oracle Database 10g Express
PostgreSQL 8.2 (Windows)
PostgreSQL 8.1 (Solaris and Linux)
:)