"For some innocent online fun this Christmas, try eavesdropping on the semi-secret pages of the UK's National Sound Archive web site. They are part of a largely unpublicised trial, hidden from casual prying eyes by the lack of signposts on the British Library's host site" (from New Scientist).
Some (but not all) is available to download and play via realplayer....(so Simon, whilst they do have a copy of BF Skinner's appearance on "In the Psychiatrist's Chair", you will have to arrange to listen to it in person next time you are in London!)