It seems that the elements are in place for some real competition in Canada:

   - all the major carriers support the iPhone
   - Apple is selling unlocked phones
   - you can get a voice/data plan without a contract if you have an unlocked phone
   - phone number portability works well

I think it's possible to get unlocked Blackberry and Android phones too, but not sure. It's too early to tell if this will lead to lower prices and better service, but I'm optimistic.