For those in or near Toronto or Vancouver, you might be interested in a radio freelancing workshop presented by CBC radio personality Tod Maffin.
I heard him speak at a co-op radio seminar a couple of summers ago over on Gabriola Island. He's a veritable fount of knowledge of all things radio.
Looks like he prefers to keep the prices (and number of attendees) low, as judging by the application process he is "selective" in who he allows to attend. However, it is well-worth trying. So if you're interested apply right away.