$10/month from AT&T and Verizon, with a few months free up front.
I was interested for no additional charge. I might have been talked into it for $5/month. For some reason, $10/month kills my interest. I'm sure others will decide that's a bargain.
Agreed. The thing isn't going to congest the bandwidth all things considered. $10 is just too rich for the value proposition, but people just love their internets.