11. A computer-implemented method for providing a display of clusters, comprising: presenting a plurality of cluster spines in a two-dimensional display, wherein each cluster spine comprises a vector of document clusters; positioning a compass over at least a portion of the clusters of one or more of the cluster spines; placing spine labels for at least one of the spines encompassed by the compass around a circumference of the compass; pinning one of the spine labels to the compass at a fixed location; reorienting the compass within the display; and displaying the pinned spine label at the fixed location on the reoriented compass.
12. A method according to claim 11 , further comprising: determining further spine labels for those cluster spines encompassed by the reoriented compass.