And speaking of that, check out the following (from the ACLS website):
The American Council of Learned Societies is pleased to announce the publication of the 2009 Charles Homer Haskins Prize Lecture by William Labov. Entitled “A Life of Learning: Six People I Have Learned From,” the lecture is distinctive in both form and content. Dr. Labov, professor of linguistics and director of the Linguistics Laboratory at the University of Pennsylvania, presents the voices and stories of six Americans who have enriched and transformed the English language. The lecture is presented in text with audio highlights at http://www.acls.org/publications/audio/labov/default.aspx?id=4462. An audio file of the complete lecture is also available.
In case you aren't familiar with the Haskins lectures:
Named for the first chairman of ACLS, the Charles Homer Haskins Prize Lecture has as its theme "A Life of Learning." The lecturer is asked “to reflect on a lifetime of work as a scholar and an institution builder, on the motives, the chance determinations, the satisfactions (and dissatisfactions) of the life of learning, to explore through one’s own life the larger, institutional life of scholarship.”
Labov's lecture is great.