I noticed this link mentioned a while back at a Rick’s Café Canadien (from good friend Dr. Richard Schwier). This is a huge digital archive from the CBC. I just love this resource. Be sure to check out:
http://archives.cbc.ca/

Also, right on this site, you will notice that there is a link that’s especially useful ‘for teachers’. There’s some really great stuff here … here’s the shortcut:
http://archives.cbc.ca/for_teachers