in reply to RFC: Conceptual association
A possibly related concept is the 'tag cloud'. CPAN has a number of modules related to managing tag clouds, although most of the interesting looking modules focus on an HTML context.
On the other hand it meets the broader, possibly unstated, objective admirably. It utilizes the data to provide an attractive visual interface to the data.
On the other hand the first phase of data that will become available represents relationships rather than value.
Disclaimer - I am totally naive about tag clouds.