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!"
Not surprised at all,
I called it way back when AT&T replied to VZW's claim of an open network
http://www.engadgetmobile.com/2007/12/06/atandt-claims-completely-open-network-too-the-most-open-eve/
Yeah, both AT&T and T-Mobile already have open networks, T-Mobile always has, AT&T's components did when they switched to GSM. It was always somewhat tragic that Verizon, Sprint, and the smaller carriers never, at least, adopted R-UIMs (SIM cards for IS-95/2000), and a "If you can insert an R-UIM into a device compliant with the standard, you can use it" approach.
Still, the issues should be resolved once Verizon pushes out LTE. The moment you don't have to ask the carrier permission to add your device is the moment you can describe that carrier's network as open.