Evolving English shows very clearly that there is no single story of the English language. David Crystal explores aspects of its evolution. Introduced by Roger Walshe. From the Evolving English exhibition at the British Library.
From http://www.bl.uk/whatson/podcasts/type/talks/index.html
Robert McCrum is the associate editor of The Observer (London) and co-author of the bestseller The Story of English, a history of the English language, that went on to be adapted into an Emmy Award-winning nine-part PBS television series. He is the author of six works of fiction, including In the Secret State and Mainland. Among his nonfiction books are the acclaimed biography Wodehouse: A Life and the memoir My Year Off: Recovering Life after a Stroke. In Globish, McCrum argues, "that a seismic shift in the foundations of our lingua franca has transformed [British and American English] from an expression of Anglo-American cultural sovereignty into a supra-national phenomenon, with its own powerful inner dynamic." (recorded 6/10/2010)
Learn English Naturally.
http://www.elllo.org/english/1051/1075-Diego-RetailTherapy.htm
Steven Pinker discusses the interplay of language and the mind and how psychological processes have shaped the English language.
The best stuff is about using Google’s enormous database of word-from-books to track how language evolves over time, in particular the gradual erosion of irregular forms in English (keep/kept and drive/drove) in favour of their regular counterparts (beep/beeped and jive/jived).
Which you WILL want to follow up with a visit to Google Ngrams - http://ngrams.googlelabs.com/ - essentially Google Trends but with all written words in the English language for the last 1,000 years (instead of all search terms in the last ten years).
Mind-blowing.