Hi Nick,
you are spot on, the requirements are heavy on the Central side, trivial on the Peripheral side. I've progressed with my iOS SW stack and was able to simultaneously connect to 5 TI KeyFobs (that's all I've got now) and get GATT notifications from all 5 at the same time with no (or only minor) problems. So far looks good, now I need to extend the test and take a few of my BLE Dongles and see what happens with 10 connections… Lets see! :)
And yes, we are building a completely new Bluetooth Smart accessory device that talks to our smartphone app (and cloud service). I can disclose more details privately, if you are interested.
Kind Regards,
-Markku