I"ve seen Rona Wilkie and Marit Falt a few times now - at the Fiddle Festival, Stonehaven and now the Edinburgh Fringe. They are really great players and perform an interesting mix of Scottish, Appalachian and Scandanavian music.
My partner and I went to see them at the Royal Oak in Edinburgh. Really enjoyed Rona's fiddle playing - particularly her improvisation and the octave mandolin (Marit) has an amazing sound. They have both moved to Edinburgh recently.