For those who are interested, I just posted a video of a talk I gave at CMU several weeks ago about Jane Street's use of OCaml.  This is an updated version of the talk I gave at POPL last year.  Various people have expressed an interest in showing the talk to their undergraduate classes, so I thought it worth mentioning on the list.

Here's the link:

  http://ocaml.janestreet.com/?q=node/61

I can also provide the original quicktime file from which this is based on request.

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