>>Is there any form of a central repository for this kind of information that
>>I can use in proposals, etc.?

You can try also http://www.firebirdnews.org/?cat=9 (Who is using FB),
but seems that some authors have classified some posts in the wrong
category, so you probably will have to skip some of them.

[]s
Carlos H. Cantu
http://www.warmboot.com.br
FireBase - http://www.FireBase.com.br
Blog - http://blog.firebase.com.br