Boards of Canada I'm not familiar with, but I have heard some of DJ Shadow's stuff. He's pretty cool. I do have stuff online (most of which is rather old):
http://www.soundclick.com/bands/3/djsckizo.htm I'm waiting for DJ Swamp to put out a new one actually. Last I heard, he was working on one but I haven't bothered to ask how it was coming or when to expect it to be released.
Sounds awesome. I dig old school hip hop a lot more than the new stuff.