...they would invest heavily in this phone from Nokia around the world, the way they have with the Sidekick and go all out to get the business customer on their GSM networks.
The E61 will also handle SIP I'm led to believe. That would really make it a world phone for if one could get on the HotSpots then all the calls there would be IP.
Since T-Mobile can control POS they move into the space very quickly, but likely would lag behind Boingo which is already making moves in that direction.