Basebuilder

I've got one database (http://www.gothamgazette.com/city/campaigns/) that
tracks a lot of people and things, and the relationships between people and
things (people want things, they have them, they're giving them up or
trying to get them). I worked out a tidy Basebuilder interface to that
database by creating sub-layouts so that you can see the things a person
has a relationship with while you are viewing that person. You can see the
people that have relationships with things while you are viewing any
particular thing.

I'd like it to be a little smarter, because for other databases that I'm
working with, it could get overwhelming.

So I'm wondering whether anyone else out there has handled many-to-many
relationships in Basebuilder in a particularly elegant way?