Its highly unlikely that we will get international roaming in the near future.
I find it much more convenient to just get a local sim card when traveling outside of North America, mainly because there are great local sim card deals all over the world that include generous data allowances.
Fongo app works fine using data for free calls to US/Canada and its easy to just forward the Canadian mobile number to the fongo number. The only thing you miss out is sms.. but more and more people are using Whatsapp and other popular messaging apps.
I also liked using the Google hangout dialer app while in other countries, it can be set up to show your regular Canadian mobile number in call display.
