Apple has spun their own chip, as usual, but the transmisssion is via bluetooth, although apple doesn't advertise that fact. They actually do work with Android devices as well, just not all the nice zo have "special" features.
Really?! Well I never. They're certainly keeping quiet about that. Looks like Engadget have paired them with a Samsung Galaxy, so it's certainly Bluetooth.
The keeping quiet is interesting. I wonder if they've added things to the Bluetooth standard to make the extra features work. In which case it's no longer vanilla Bluetooth, so using the word "Bluetooth" wouldn't be a good idea. Also it'd be more like a derivative work. Getting patent licensing in order would be necessary.