> http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_powered_firebird

not sure if the same but there's also:

http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_users_firebird

and then, this one here may be also of some value:

http://www.cvalde.net/WhoUsesIB.htm


Regards,
Anderson Farias