I like the idea of wearable wireless devices. I am thinking heart rate, O2 levels, respiration rates, etc while exercising would be a nice use of the technology. Small, light, long battery life come in very handy for these types of applications. I wonder if these could be used for a secure dog or cat collar? Putting one on a loved pet and providing some basic tracking would be nice but I am thinking that would require some sort of infrastructure.