Alain,
SourceForge was running on PostgreSQL until the recent switch to DB2 (which
was part of a deal with IBM, not because of technical considerations).
That's a huge, high-transaction database for you. Unfortunately, I can't
find a single news item related to this.
And, of course, Afilias already runs the .INFO domain on Postgresql ... you
would have found that on Advocacy.
I have several large corporate clients who use PostgresSQL in production ...
and, of course, can't talk about any of them. NDAs, y'know?
--
-Josh Berkus
Aglio Database Solutions
San Francisco