You have it backwards - I agree with you on this
I'm moving from an OODBMS to PostgreSQL - OO to relational. OODBMS's have issues with large (acutally even small) numbers of concurrent users.
[link|http://www.blackbagops.net|Black Bag Operations Log]
[link|http://www.objectiveclips.com|Artificial Intelligence]
[link|http://www.badpage.info/seaside/html|Scrutinizer]