10. A non-transitory, computer-readable storage device containing software that, when executed by a processor, causes the processor to: extract candidate phrases from a content stream; calculate an importance value of the extracted candidate phrases based on frequency of the extracted phrases in the content stream; threshold the extracted candidate phases based on the calculated importance value; calculate an average sentiment value for the thresholded candidate phrases using term-association; increase the calculated importance value in response to a negative average sentiment in the thresholded candidate phrases; assign a visual cue to the thresholded candidate phrases; and graphically display the visual cue representative of the thresholded candidate phrases in statistical clusters.
12. The non-transitory, computer-readable storage device of claim 10 wherein the software causes the processor to assign the thresholded candidate phrases a visual cue using the calculated importance to determine at least one property of the visual cue.