As far as I understand, it's just one dev doing it, and he's been working on a second project which is taking up all his spare time (this is not his job, just something he does on the side). He has committed to adding to the database once this second project is complete. Don't worry, it has the main aircraft in there and I've never had any crashes/bugs with the software.
Yes PFPX is the new product and I can't wait for it - it's taking far too long though!