How about creating an iPhone application for cancer.gov? Different apps could be developed for different types of users - patients, caregivers, doctors and nurses, family and friends. Apps could be used for a whole host of different needs - for a patient, there could be a journal and calendar feature that allows them to track their treatment, chronicle their day-to-day activities, feelings, and changes, document their appointments, schedule reminders, etc.
Patients, their families and friends could use also an app to stay emotionally motivated and connected to support groups, etc.
Health professionals could use an app to stay connected to the latest research and updates from NCI and the cancer community.