I'm going to be a dickhead now, so if you'll excuse me for that.
I think the idea of 'experimental' folk scene is a bit wrong. I think it's a misunderstanding of what folk music is. Folk music isn't a guy with an acoustic. It's the traditional music of an area or locality. I know that the word 'folk' has acquired connotations around the ambit of 60s types like Dylan, and while I'm fine for words to accrue new meanings, I think folk is one of those ones where the 'new' meaning has ended up obscuring the far more culturally important work of the traditional music of a people or area. I don't think one 'experiments' with folk, it develops much slower than an individual's will.
Right, I've got that little whinge out of the way.
Gaelic Psalmody from Lewis.
A ropey version of a great song about Stornaway
More Psalmody (because it's genuinely incredible - one of my plans for next year is to actually hear some in person)
Royal Edinburgh Tattoo (arguably not folk, but definitely traditional).
Elke Baker, Scots fiddle - a tradition I find really hard on the fiddle. I tend to prefer the Irish stuff, especially from the North-West of EIRE though.
One of the links that popped up from that one -
Shetland fiddle (played the proper way).
I'll have a bit of a think about this - I'm sure I've got some non-highland bagpipe stuff somewhere, but I can't think of the names of any players at the moment.