Let the hive mind of Engadget get that for you.
"I'm in the market for a new phone and money isn't a limitation. I'm also not partial to any particular US carrier, but here are some of the features I'd like to have: WiFi, GPS, good coverage in lots of places, push Gmail (a must!), physical keyboard (a must!), a touchscreen, decent battery life and a relatively slim body. And please, nothing that has a fruit logo on it. No offense to the fruit fans, though. Thanks!"
I've had my iPhone for several weeks now with an American (AT&T) contract. Because I live in the Netherlands my iPhone always is in Global Roaming mode. Up to now I've been able to use the Data services on every network that has GPRS coverage (also in Germany, England, France and Belgium) and Yes, it shows up as an 'E' on the display.