Just starting the documentation but two quick thoughts:
First, most conventionally, this could be the back-end to a topic map server. Despite having started off many years ago in server administration (or perhaps because of it), server configuration/management isn’t an “additional” duty for any mission critical development/support staff. Too easy to hire server management services, who are capable of providing maintenance/support that no small firm could afford locally.
Second, a bit more unconventionally, this could be an illustration for a Topic-Map-As-Service. Think about it. If instead of the mish-mash that is Wikipedia, you had a topic maps of facts that were supplemented (read mapped) to records from various public reporting agencies, that could be interesting to “press” a local topic map against to acquire more recent data.
True, there are the public record services but they only give you person by person records and not relationships between them. Not to mention that if you are inventive, you could create some very interesting topic maps (intersections of records).
Imagine the stir that a topic map of license plates of cars with local plates at motels would cause. Rather than offering free access, since most people would only be interested in one license plate in particular, suggest that you show one plate at some random time each hour and where it was seen. (not the date) Sell advertising for the page where you offer the “free” sneak peak. Suspect you better have some load expansion capacity.