Funny stuff.
I once heard a interview with Slash, former GNR guitarist, and they had this guy with an accordion, they played a couple parts of some GNR stuff. Sounded pretty cool, I wish I could find that piece. So reading some reviews I found this band and limewired a couple of songs to hear it out.
Here is some of the review..
The lyrics are a combination of English and Finnish, and the songs range from quieter folk influenced tracks to boistrous drinking songs like "Happy Little Boozer." They take elements from Celtic style bands like Dropkick Murphys, Flogging Molly and The Pogues and add a metal twist. The vocals are melodic in parts and have a death/black metal feel in others, but the mood and attitude of the album is one of celebration and optimism.
Happy Little Boozer made me bust up. Field of Flames is not bad song either, not total black metal, but one the better pieces.
edit:
I would love to see those Lord of the Dance dancers keep up with this band.