One other thing about this project that might be of interest to Code4Lib readers is that the most technically challenging part of the interface was making the facets work properly so that they simultaneously applied limits across tables that are linked with a many-to-many relationship.
The two main tables that are involved are Movies/Programs (works/primary expressions) and Versions (expression/manifestations). These go with the two sets of facets, which we visually separate for the interface in the hopes of communicating their different functions to users. Movies obviously can have many versions. If you look at the Citizen Kane record, you can see that it was released in many formats, including VHS, DVD and LaserDisc, with various language options. A given manifestation can also contain more than one work. If you search for Kyle XY, you'll get ten records for episodes that are part of a season of the TV program. These are all on the same manifestation. The versions table is also linked to a table that represents items and is the intersection of the versions/manifestations table and the libraries table, but this is a one-to-many relationship. The facet counts under Versions are really for items, but it would be interesting to see whether this would be more useful if the count was for versions. Kelley