I was searching trough blogs
http://www.technorati.com/cosmos/search.html?rank=&url=firebird&start=20
and found this link on gadgetopia (yes they are back with one more comment )

"Firebird has a 39% share of open-source database deployments? One
percent behind MySQL? That's amazing, as I thought it was still a hidden
gem."

http://www.gadgetopia.com/2005/03/30/FirebirdDatabaseServerPenetration.html#CommentID_8025

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Regards,

Marius - folksonomyous