Originally Posted by Shaggy
Assuming that this is even possible to do, which it may not be.
It's completely possible. Every wireless device has a unique identifying number/hash/whatever. In a GSM device, this comes from the SIM. With CDMA, it comes from some on-board chip instead.
If they couldn't shut off access for a specific device/SIM, they wouldn't be able to shut off subscribers who didn't pay their bills, or block other carriers from using their towers willy-nilly without an agreement beforehand. The question is: what are the terms between iRex and Verizon, and does it include the ability of Verizon or iRex to decide if a device is using too much bandwidth and not generating enough revenue or is iRex planning on just eating all those costs...
The real problem I see with side-loading with wireless is that the iRex does zero sorting of content. Everything just gets thrown into a "Downloads" folder. Not very useful (IMO) unless you like the flat list views. Although to be fair, none of the ereader manufacturers has really done much to solve this, except maybe Onyx (not sure).