As your database driven approach to WW2 research was - in another scale though - the inspiration for my own website after the presentation in Karup, 2006. I am still very impressed with the work!
Could it be an idea to be able to search the other way around, e.g. a picture gallery. If often get the impression, that people has an idea of a photo they once saw, and are looking for the aircraft details. That must be the case for you and the users of
www.ahs.no as well?
Mikkel