I'm no international traveler, but as soon as my contract is done with verizon, I will be a trendy new IPhone owner. I haven't had any problems at all with verizon, other than the fact that they don't have an IPhone. If for some reason I change my mind, the Blackberry Storm, through verizon, looks like they're trying to copy they IPhone. And they both offer a 3G network. But unless I'm miss informed, the Storm will only work off of the 3g, and can't pick up on wi fi hot spots like the IPhone.
Don't get stuck in a S#!++y contract. Best of luck with the your cell phone hunting!