On the old iPod right now:

Enter the Haggis
Ashley McIssac
Real McKenzies
Dropkick Murphys
Barleyjuice
Flogging Molly
Glenfiddich Piping Championchips
Old Blind DOgs
Peatbog Faeries
Scantily Plaid
Seven Nations
Slainte Mhath
Wicked Tinkers