First of all, a disclaimer; this is my best friend's band.

Rising Gael is the best Irish band you've never heard of. I feel like they should be getting more exposure, so I'd like to encourage you guys to check them out. Here's their website:

http://www.risinggael.com/

and you can even preview and buy their music on Amazon or iTunes

If nothing else, just listen to a few tunes. They're truly spectacular. A great group of musicians, dancers, Gaelic speakers, and entertainers.