This is a pre-announcement of what looks to be a service to connect the iPhone to any fitness and health self-tracking device that uses the ANT+ low power wireless protocol. In lay terms: this means that you should be able to get a bunch of things to talk to your iPhone that couldn’t before, including some popular sports watches, heart rate monitors, pedometers, rowing machines, etc. I haven’t been able to find a good list of popular self tracking tools that use ANT+, but here is a list of companies listed on the ANT+ web site. I assume that at least some of the products companies these companies make use ANT+. Maybe they all do. Enlighten me in the comments if you own an ANT+ device.