CBC Radio 2 (Canadian Broadcasting Corporation) - Concerts on Demand - 681 concert performances online to date:

http://www.cbc.ca/radio2/cod/

Listening to k d lang right now:

http://www.cbc.ca/radio2/cod/concerts/20080504klang

You might find something you like.

Edgier stuff is here:

http://radio3.cbc.ca/