A number of faculty at SF State are interested in textual analysis, natural language processing and data mining. This article (Opinion Mining and Sentiment Analysis in the journal Foundations and Trends in Information Retrieval, 2, 2008 http://www.cs.cornell.edu/home/llee/omsa/omsa-published.pdf) by B Pang and L Lee discuss the rapid emergence, since 2001, of the area of sentiment analysis. That is, doing information extraction expressly to summarize sentiment and opinion. From intelligence analysis to marketing and movie reviews, this article is a gold mine of information and methodological complexity in this fast breaking field.
Opinion Mining and Sentiment Analysis