I really don't think that it matters that much Uillean was mis pronounced or misapropriated in to or out of union (or the other way around) the accepted name is now Uillian.

Big Mick and Sandy MeLean there is a hot movement in scotland (which is being really frowned upon by the piping establishment) to restore (or as I prefer to call it Demilitarise) the music. They are learning from pipers and the piping tradition as was carried accross the pond before the standardisation of the music and playing and are bringing it back into mainstream music. Admittedly it is being done by predominantly smallpipers and border pipers but it has champions in the Highland piping circles as well.

Try Hamish Moore for more information.