A Wittgensteinian Approach to Discourse Analysis - http://www.criticism.com/da/lw_da.html Article by Steven M. Hoenisch. Examines influence of Wittgenstein on Gricean pragamtics, and on Searle's speech act theory, to motivate Discourse Analysis.
Discourse: Patterns of Complex Adaptation - http://www.winternet.com/~eoyang/discourse.htm The dynamics of conversation in a learning community as a special case of complex adaptive systems.
What is meant by Discourse Analysis? - http://bank.rug.ac.be/da/da.htm Introductory article by Stef Slembrouck. Mostly from a socio-linguistic perspective, but sensitive to philosophy of language.
Social Significance Of Patterns Of Questioning In Classroom Discourse - http://cla.libart.calpoly.edu/~jbattenb/papers/hickman.html Article by Sarah Hickman discussing what educators need to know about patterns of classroom discourse, to best appraise the needs of their students.