Mobile Wifi Hotspot on iphone with AT&T with IOS 4.3 release...
 

Hi,

Is Mobile Wifi Hotspot on iphone with AT&T with IOS 4.3 release actually true ?
I read somewhere on the web that there is a $20 monthly charge for this with a 2 gig limit, which would be fine if it is true and actually works.

Does anyone know how this works ?
what are the pro's and con's about this new feature ?
how many devices can be connected wirelessly ?

I'm still running IOS 4.2.1 and haven't seen any need to upgrade other than being able to use this new feature without having to be jailbroken.

Is this via tethering or is it completely via Wifi ?

Thanks in advance....