The AI Education Repository at www.cacs.usl.edu/~manaris/ai-education-repository/
nlp-tools.html has resources on natural language processing, including information about software tools and links to other Web resources. Some of the most advanced natural language research is going on at the MIT InfoLab. You can learn about the lab's projects and explore some demos at www.ai.mit.edu/projects/infolab/welcome.html. (The Conversant Systems Web site at www.conversantsystems.com is no longer available).