Anyone that is into Celtic music, particularly the kind that is fused with a more modern rock sound (electric guitar, etc) should check out Prydein.
My father in law stumbled upon them at a Scottish festival in Maine. Few can match their skill on the pipes. They rarely venture outside the northeastern US, which is a real shame.
There's nothing that stands out about the quality of the recording, but Loud Pipes (Save Lives) and Emi's Jig, among others, will rock your face off.
Prior to these guys my favorite of that genre was Enter the Haggis. They're also worth checking out. And Canadian!
