It is exciting to be officially part of the DotNetNuke community. I've been an avid follower of DotNetNuke from the 2x days and have followed it as it has come a long way from its initial concept by Shaun Walker.
I was introduced to Firebird® last year by another client of ours who was interested in using it in an embedded device to run a small inventory tracking application. A couple of months later, I decided to see whether I could get DotNetNuke running on it. Due to various other commitments I couldn't follow through with this till late last year when Michael Washington and a couple of other guys decided to give it a shot. We started doing the initial conversion of the scripts and I helped write most of the provider classes using the Oracle one I had written earlier for reference.
We can finally see the end of the tunnel and with the help of two new volunteers (Greg Leonardo and Layton), we're in the process of going through the steps of getting a stable release of the firebird data provider.
In addition to releasing the provider, we'll also be trying to implement (in the coming weeks) the DAL II proposal which was authored by Michael Washington and using this with the Firebird Data Provider.