Your customers can keep track of their blood pressure with their iDevices-- using Withings' Blood Pressure Monitor.
Connecting via iDevice 30-pin connector, once the user wraps the blood pressure cuff around their arm it measures blood pressure results (either once or 3-measures in a row) in around 30 seconds, before saving Systole, Diastole and BPM on the connected device via free app.
Users can then access an online dash to keep track of results-- or sync the device with Microsofot HealthVault or Google Health. The app also allows one to automatically email results to their doctor.
It thus appears to be ideal for the more health conscious of customers, especially those using Withing's own wifi body scale. In fact, wifi scale users can get their track their weight and blood pressure on the same graph, bringing 2 kinds of health readings together.