Palm is now offering the Palm Centro unlocked GSM version smartphone for $299 with free shipping. It doesn't require any carrier contract. Here is more info:
The Palm Centro smartphone gives you voice, chat-style messaging, email and web, along with a color touchscreen and even a full keyboard. (So you can say L8R to those tricky keys on your cell phone.) All of this in a phone that's a whole lot smaller than you think. And now Centro is available unlocked for the flexibility you want. It's also GSM ready for happy traveling.