I receive today the news, from a fellow in CFLP that works at Bank of
Brazil, that BB is moving internal systems to Firebird.

This webpage (portuguese only) as a link to Firebird as well:
http://office.bb.com.br/office/plugins/index.html

that links to this one:
http://office.bb.com.br/office/plugins/index.html

A translation to english could be something like:

"The enterprise applications from BBstore the data generated on is use,
in order that you can consult them in case of necessity. This storage is
done by Firebird Database Manager System".

Maybe someone from Brazil will help me here, but I think BB it's the
biggest bank of South America.

Artur