Increasing numbers of people with type 1 diabetes, all of whose lives depend on insulin, as well as type 2 diabetics, have already adopted the insulin pump, which replaces a regimen of insulin shots with a continuous delivery of insulin. Yet many who stand to benefit from "the pump" are put off by not fully understanding the device, and many already using it don't have anyone with whom to compare notes about its use. Now Gabrielle Kaplan-Mayer, who...