Here is a fascinating documentary, divided into two parts, on YouTube, on some history of the uilleann ("ill'-en") pipes. Many famous players and makers are featured. Many parts of it are in the Irish language, which is fascinating in itself for non-speakers, with subtitles in English. It is really well worth a view.
Part 1 - http://www.youtube.com/watch?v=bCcB_8lg1B0
Part 2 - http://www.youtube.com/watch?v=mn_W76Ad93U
Many thanks to YouTube user fergmaun, whoever he or she may be, for posting this gem!