[Tetreault's Corpora/Annotation List] Scroll down to see Joel Tetreault's extensive list of existing corpora and annotation schemes.
[Electronic Bibliography on Discourse Analysis]
[Computing Research Repository ]
[Association for Computational Linguistics]
[Natural Language FAQ]
[Natural Language FAQ - Carnegie Mellon]
[The NLP Dictionary]
[Linguistic Data Consortium]
[The Linguist List]
[Computational Linguistics Archive at MIT AI Lab]
[Linguistics Databases at the MIT Libraries]
[ [ACL SIGDIAL]
[AAAI Fall 1997 Symposium on Communicative Action in Humans and Machines]
[AAAI Fall 1999 Symposium on Psychological Models of Communication in Collaborative Systems]

Conversational Characters and Systems

[Peedy at Microsoft Research (Gene Ball)]
[Steve at the University of Southern California (Lewis Johnson, Jeff Rickel)]
[Cosmo at North Carolina State University (James Lester)]
[The Woggles at Carnegie Mellon University (Joe Bates)]
[TRAINS at the University of Rochester (James Allen)]
[Jupiter Weather Forecast at the MIT SLS Lab (Jim Glass)]
[Collagen at MERL (Charles Rich, Candace Sidner)]

Miscellaneous

[CiteSeer - Scientific Literature Digital Library ]
[http://www.yahoo.com/Social_Science/Communications/]
[http://www.yahoo.com/Social_Science/Linguistics_and_Human_Languages/]
[ Journal of Computer-Mediated Communication]
[ Association of Computing Machinery (ACM) Digital Library]