Hello ,

there is one thing i want to mention about open source databases article
http://www.computerweekly.com/articles/article.asp?liArticleID=126683&liArticleTypeID=1&liCategoryID=6&liChannelID=30&liFlavourID=1&sSearch=&nPage=1

open source interbase forked into firebird and is supported by firebird
foundation (like in mozilla case where AOL gave up to mozilla source
code and is managed now by foundation with the same name)

The firebird site is located here http://www.ibphoenix.com and
http://www.firebirdsql.org

If there is a need for more info about firebird i would be very happy to
write more about it .

Open source databases are used in mission critical services like dns
(I know about postgresql is used to host .org domains )
another example : we use opencms (www.opencms.org) and mssql server
doesn't scale up with that application , mysql is faster to handle the
requests (more I/O) . Yes we use all of the open source databases
firebird,mysql,postgresql in mission critical points .