yeah cool, peeps have pretty much listed all the good stuff. i was heaps into this stuff circa 2005, when it was playing around every experimental music nerds system after the whole intense MEGO and mille plateux went out of fashion and everyone started listening to folk music. The finnish guys really had it going. in my opinion Jan Anderzen from Kemmiliasit Ystervet is one the best musicians of recent times, his records, particuarly kellari juniversumi, is absolutely killah.
other than him Lau Nau and Islaja totally rinse it, Avarus and Keijo are great also.
For a while there was this Finnish psych folk/New Weird America thing.
To check it out, Foxy Digitalis
http://www.digitalisindustries.com/foxyd/index.php, was the prime mover of this stuff. I used to think they were the coolest thing in the world. And it was, a lot of it.
Also go to
http://www.terrascope.co.uk/, the Terrastock festival in kentucky is the main festival that attracts this stuff around the world.
Yeah its all awesome music but havent listened to any of it in a while, i collected a rather ridiculous amount of the records though.
And also you might want to check Francis Plagne from Melbourne. Two incredible albums. he is also a childhood friend of mine and a former band member. amazing guy and great music.