I just finished the Firebird 2.5 packages for Mandriva
They are available in Cooker and in Contrib/backports for 2010.1 and 2010.2
Doing this work, I saw that I made a mistake in Fedora packages, so they areupdated in Rawhide and EPEL6
I also updated my Fedora 14 repo (http://repos.fedorapeople.org/repos/makowski/firebird/)
good having doing that before the end of the year !