It's also trivial to be able to pose as someone else's computer on coffeeshop style wifi networks. It's likely the same is true here, which would allow anyone inclined to pose as the owner which could suck with a usage based pricing model.
Yeah, I was wondering if it was MAC based. I ordered one so I'll see how badly it breaks once they actually ship them. It's too bad because they probably could do something clever like cross service 802.1x. One SSID for enrollment and the other using 802.1x for all enrolled people (perhaps using a service-wide SSID so you could "roam").
