I have been following this thread with interest despite it wavering from the well informed to the ridiculous.
The origins of the Bagpipe are, of course, obscure however the accepted wisdom is that the origination was during the Hittite civilisation of the Middle East around 2000BC when the musicians of the day got fed up having to interrupt their flute playing to draw breath and some genius decided to add a bag and blowpipe. The bag being made from some type of animal skin or innards.
From there the Romans took up the cause and spread the instrument throughout their conquered lands. There is even historical evidence that Nero played a bagpipe and not a fiddle. This is how the bagpipe came to arrive in England, Scotland, and Ireland and evolved into it's present day highly sophisticated forms.

For further detail on the Uilleann pipes there is the site of Na Piobari Uilleann at www.pipers.ie and a superb Uilleann discussion forum on the message boards of www.chiffandfipple.com where answers to any question will be found.

Cameron