Is there an algorithm which measures negativity in a given text? Considering the level of grammatical errors and sarcasm involved, one would need a really compl

Is there an algorithm which measures negativity in a given text? Considering the level of grammatical errors and sarcasm involved, one would need a really complicated system, I'd bet. A google search brought me to Sentiment Analysis page on Wikipedia[0], which, after the initial skimming, doesn't seem to link to any implementations. [0]: http://en.wikipedia.org/wiki/Sentiment_analysis http://en.wikipedia.org/wiki/Sentiment_analysis