The CGMS (Continuous Glucose Monitoring System) is available with the Medtronic Minimed Paradigm pumps (522 or 722). A 10-pack of sensors costs $475 Canadian - well out of reach of my budget. Each sensor is supposed to be changed every 3 days, although I've read that people leave it in longer.
When I got the pump approved by insurance, I thought that they would pay for the "attached" (via radio frequency) CGMS. They balked at the submitted monthly cost from Medtronic, understandably, but they DID pay out $6400 of the $6800 pump cost. So, I now have a pump with no CGMS. Even if I could use it, I'm lean and have a hard time finding sites that work (seems I don't have enough fat) so I don't know that needing TWO sites would work for me.