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!"
What is the point of unlocking a CDMA phone? If the PRL can't be updated and the software flashed to a carrier version you will end up with a phone that wont get service, and I doubt Sprint will provide tech support for your device if you didn't purchase a Sprint branded phone. I suspect this will end up trickling down to Verizon and Alltel as well. But it will be easy enough for the 3 carriers to see where the phone came from based on the ESN and then say we don't support the phone. It may be a pain to have to individually add each phone to the allowed devices database, but other than that customer's should be able to use whatever phone they want if they know the risks.