This is an amazing plugin first and foremost, thank you scribu!
My current custom post types I use are: Clients, Projects and Services. Each Client can have many Projects, and each Project can have many Services.
What I would like to accomplish is a faceted navigation, or filtering, of the related Projects I'm displaying on my individual Client page by the Services that are tied to my projects.
I can list out the Services, however, the list displays duplicates of Services that are tied to more than one Project.
Any help would be appreciated.