12. The system of claim 11 , further comprising an opinion database unit coupled to said opinion analysis module and said multi-dimensional visualization engine, said opinion database unit including a database containing identification information of each retrieved document, topic extracted from said each retrieved document, relevant metadata, and opinion scores of said each retrieved documents.
12. The system of claim 11 , further comprising an opinion database unit coupled to said opinion analysis module and said multi-dimensional visualization engine, said opinion database unit including a database containing identification information of each retrieved document, topic extracted from said each retrieved document, relevant metadata, and opinion scores of said each retrieved documents. 13. The system of claim 12 , further comprising an opinion cache unit operatively coupled to said opinion database unit and said multi-dimensional visualization engine, said opinion cache unit operatively coupled to said opinion database unit and said multi-dimensional visualization engine, said opinion cache unit including a high-speed in-memory server containing precomputed data.