Eric Lipton has a piece in Wedneday's (4 Oct. 2006) NYTimes about some "new" research efforts to come up with software "that would let the [U.S.] government monitor negative opinions of the United States or its leaders in newspapers and other publications overseas."  (See "Software Being Developed to Monitor Opinions of U.S.")  Surely this is an interesting problem, and one made especially difficult when the translation factor kicks in. 

This is not, however, the first attempt to gin-up such software.  We have long admired the work done some years ago at the Pacific Northwest National Laboratory in the ThemeRiver™ visualization.

It "...helps users identify time-related patterns, trends, and relationships across a large collection of documents. The themes in the collection are represented by a 'river' that flows left to right through time. The river widens or narrows to depict changes in the collective strength of selected themes in the underlying documents. Individual themes are represented as colored 'currents' flowing within the river. The theme currents narrow or widen to indicate changes in individual theme strength at any point in time.  Status: An interactive proof of concept prototype has been developed. Download a QuickTime video about ThemeRiver (20MB)

We hope the PNNL will continue by giving us more of this intriguing tool.