Petro Canada also offers Canada wide calling, but you are limited to 200 to 400 minutes, depending on the plan you pick.

If you have the unlimited plan, I would keep it, because it is not offered anymore. If you have to call out of province regularly, I would get a Skype subscription for $3 a month, 15% less if you pay yearly, and use Skype2go. You set up the long distance numbers on the skype2go web interface ahead of time, and you can then call a local skype2go number for each entry, and skype2go relays that to the long distance number you want to call. Once set up, it is pretty easy to use.