1. my guess is $29.99
a big question - will it be per day or per flight or as others have mentioned per minute? on per day will it include connections? if I have two flights (or six on a MR), $29.99 becomes more palatable; however, per minute charges circumvent this possibility. ironic if MR pax could further deplete resources by hogging bandwidth on six flights under a per day charge. in fact, i am sure that per flight makes more sense.
2. has anyone tried to use a notebook pc in coach?

you can't get screen open past 60 degrees while pc is on tray table b/c it hits seat back in front. i guess exit row seats with trays in arms rests are even more valuable.