I'd ++ this a hundred times if I could. From my experience, PostgreSQL is also easier to work with for developers, DBAs and sysadmins.

Update:

At $work, we're probably saving about $80k a year in royalties and/or licensing fees to Oracle. We no longer need to keep an Oracle DBA on retainer so we're saving more money there.

It takes less than a 1 minute to install our custom compilation of Pg as opposed to 15 or 20 minutes for the equivalent Oracle install. I couldn't tell you how many software engineer man-hours each year we used to spend tracking down Oracle specific bugs because we received absolutely no support from them (several hundred at least). As you all know, time is money.

You're experiences may be different from ours but everyone that I've spoken to who has also made the switch has had nothing but good things to say about PostgreSQL and always gush about the total cost of ownership. :)