The real kick in the teeth is that paying AT&T to enable tethering doesn't actually get you any extra data, it just allows you to use the data you're already paying for in a different way.

At least with Verizon's current tethering charges (on Droid), you get an additional unlimited-but-really-5GB of data for your $30 charge. I imagine that iPhone will be the same.

In Italy, too.

And the UK on some networks. O2 for example charge more, 3 just take it out of your phones data allowance.

Not on TMobile...

Canada too, with Rogers. Tethering is not allowed on the default data plan (500MB). You have to pay for 1GB (an extra $10 or $15 / month, I think) if you want to tether. I tether all the time and only use about 300MB of my 1GB plan, so I get really pissed when they use their excuse that "you need to have a full 1GB to tether or you'll run out!!11!". Fuck Rogers.