On November 22nd, Dave Meslin of the Toronto Cyclists Union and Bonnie of the Vancouver Area Cycling Coalition appeared on CBC Radio's The Current. You can hear the interview here: http://podcast.cbc.ca/mp3/current_20071122_3968.mp3. As is typical of media, the focus was on the road rage incident of the motorist recently attacked by cyclist with a screwdriver. They also fielded their opinions on the idea that cyclists should be licensed.
The CBC Radio file on "Bicycles versus Cars" is an 11 MB download in MP3 format and runs 23:46.
"In the average big city, cyclists and drivers have trouble getting along. The Current takes a look at efforts to improve that relationship."
There were some good responses. Dave mentioned that to focus on the cyclist aspect of the attacker is akin to focusing on shortness as a factor in being aggressive. There's no reason to think cyclists are inherently aggressive.
Likewise, the notion that licensing cyclists will "solve" these problems is short-sighted and ignorant. It would require new cyclists to go out and get a license before stepping on a bike and would possibly prohibit children from riding their bikes.