OP: Answer is that TMO supports it, individual hotspots may/may not. You CAN log in to sites that require log-in on the 8320, there is a button when you connect that brings up the wi-fi browser using the gateway IP address received from the AP.

I have used my curve while traveling internationally (in the UK).

dtsm: Seattle was the trial run - it's now national. Where do you see international roaming for wi-fi based on IP address? Certainly not in my T&C.

worldwidedreamer: I think you're confusing hotspot access with @home. You cannot use US hotspot access to connect to non US hotspot locations. If you pay for local access, then you can log in, and you can use @home. By default, you won't connect.