Email from PetroCan,

SIM cards may be purchased for $25.00 by calling Customer Care at 1-866-788-3475.
Simply purchase a Petro Canada Mobility airtime voucher at a participating Petro Canada or Sunoco retail outlet.
A new Petro Canada Mobility SIM card will be mailed to you with a new Petro Canada Mobility number.
The SIM card and number are already active. Ensure you have a unlocked GSM/HSPA handset capable of operating on 850/1900 MHz frequencies.
Guests that purchase a SIM only may experience limitations with the Petro Canada Mobility features if using a non-supported Petro Canada Mobility handset.
All SIM only sales are considered final sale and are not eligible for a refund.
Best regards,

Suncor Energy Products Partnership
Customer Relations
Phone ~ 1-800-668-0220
Fax ~ 1-800-837-1228
Email ~ custsvs@suncor.com

Has anyone in the Ottawa area tried one of their SIMs in an iphone 3gs locked (unlocked) to the Rogers network?