[An Ecology of Embodied Interaction: Turn-Taking and Interactional Syntax in Face-to-Face Encounters. PhD thesis by Leslie Hope Jarmon (1999). Or download the whole thing as a .zip file.]
[Electronic Bibliography on Discourse Analysis]
[Computation and Language E-Print Archive]
[Association for Computational Linguistics]
[Natural Language FAQ]
[The NLP Dictionary]
[Linguistic Data Consortium]
[The Linguist List]
[Computational Linguistics Archive at MIT AI Lab]
[Linguistics Databases at the MIT Libraries]
[Discourse Resource Initiative]
[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

[The NECI Scientific Research Literature Digital Library]
http://www.yahoo.com/Social_Science/Communications/
http://www.yahoo.com/Social_Science/Linguistics_and_Human_Languages/
http://www.ascusc.org/jcmc/ (Journal of Computer-Mediated Communication)