> I've read about the iBGStar a few times, but I really can't understand why they use the 30 pin connector instead of bluetooth. It seems unnecessarily limiting

Not to mention the fact that many diabetics need to check their blood sugar several times a day, which could introduce a lot of wear and tear on both the glucometer and the iPhone.

I remember when these machines cost several hundred dollars, were difficult to calibrate, and about the size of a netbook, but most glucometers these days are small and can be purchased for as little as $10.

The ability to record and track blood glucose levers over time is a "nice to have" feature, but this data could also easily be stored on the device and transferred to a computer later via a bluetooth or mini-USB connection.