15. A computer program product for determining crowd sentiment, the computer program product comprising non-transitory computer-readable media encoded with instructions for execution by a processor to perform a method comprising: scraping a computer network to obtain one or more documents; storing new documents of said one or more documents in a document repository; processing each of said new documents through a filter to extract at least one keyword; identifying each of said at least one keyword that is a system keyword and updating a relationship database comprising one or more system keywords, keyword links and statistical information for each of said one or more system keywords for a predetermined period of time, wherein said statistical information for said each of said one or more system keywords comprises volume, velocity and crowd sentiment; maintaining said one or more system keywords, said statistical information and said keyword links with a keyword cache system; and repeating the above steps at regular occurring sample intervals, wherein volume is number of occurrences of a system keyword in each sample and wherein velocity is rate of change of volume.
15. A computer program product for determining crowd sentiment, the computer program product comprising non-transitory computer-readable media encoded with instructions for execution by a processor to perform a method comprising: scraping a computer network to obtain one or more documents; storing new documents of said one or more documents in a document repository; processing each of said new documents through a filter to extract at least one keyword; identifying each of said at least one keyword that is a system keyword and updating a relationship database comprising one or more system keywords, keyword links and statistical information for each of said one or more system keywords for a predetermined period of time, wherein said statistical information for said each of said one or more system keywords comprises volume, velocity and crowd sentiment; maintaining said one or more system keywords, said statistical information and said keyword links with a keyword cache system; and repeating the above steps at regular occurring sample intervals, wherein volume is number of occurrences of a system keyword in each sample and wherein velocity is rate of change of volume. 16. The computer program product of claim 15 , wherein said keyword links comprise links between any two of said one or more system keywords and links between said one or more system keywords and said documents in said document repository.