I'm just looking through my list of possible enhancements for TWOTA and one was to add a search feature to the site. This is certainly possible, but I wonder if it's really worth it. We already have the related articles, pictures, etc at the bottom of each encyclopaedia entry. So long as everything is linked together well (as it should be), it seems to me that looking up the particular aspect of the Panzer world in the encyclopedia would produce better results than a search engine anyway.
So, is a search engine really needed (especially given that this might be quite a lot of work to implement)?