1. A computer-implemented system for displaying clusters via a dynamic user interface, comprising: a cluster spine module to display cluster spines, each comprising two or more clusters of documents; a compass framing at least a portion of one or more of the cluster spines in the display; a label generation module to generate at least one label to identify a concept of one of the framed cluster spines; a label display module to display the label circumferentially around the compass; and a concept module to change the concept as the compass moves over others of the cluster spines.