Since I haven't seen anyone else mention it, I thought I would throw in the Ruth McKenzie CD "Kalevala: Dream of the Salmon Maiden" which was an astounding collaboration sparked by her 1993 tour in Finland with Red House Records group Trova. "Ruth MacKenzie fell under the spell of a vocal style called "kulning" (a high-pitched Swedish song for calling animals). She soon returned to Scandinavia to study this and other traditional vocal styles with singers and teachers, who included Anna Sjobeerg, Liisa Matveinen, Mari Kiukas, Liisa Laaveri, and others. Petra Zilliacus and Barbara Cohen contributed the vocals for the CD and the live performances. It was billed as a "concert event" but is more like a folk opera with dance, done to higher artistic standards than Riverdance.

You can learn more about the project at Omnium Record's website here:

http://www.omnium.com/kalevala/