Right on Greg! Shame on me for not mentioning other celtic traditions...I was trying to give axman664 a starting point for his band. There's a wealth of music from Wales...Sain Records in Caernarfon would be a good resourse. There's a group called 'The Wild Welsh Women' playing traditional material. Sian James, Robin Huw Bowen, The Alarm(not traditional for sure), Dafydd Iwen. I bought a book a few years back called 'Blodau'r Grug' - 100 Popular Welsh Folk Dance Tunes. There's no CD with it, but the melodies are pretty easy to figure out and the chord changes are there. Here's the publishing info:

THE WELSH FOLK DANCE SOCIETY SALES OFFICER ANDREW BARTHOLOMEW 12 Rookwood Avenue Llandaf Cardiff CF5 2NP WALES