These two sites provide an intellectual biography of John Gumperz.  The first ones (Part 1 and 2) are audio recordings and transcripts of Gumperz work. Hope you enjoy hearing this history of linguistics as well as Gumperz’ intellectual biography.

Link 1: A LA MEMÒRIA DE JOHN J. GUMPERZ

Link 2: A la memòria de John J. Gumperz: un record personal a dues veus