Originally Posted by NJBlackBerry
Data is not expensive. If you do not browse the web or use IM while there, it will not be expensive at all. Voice roaming is expensive...
That is my experience also... I use Cingular, and they don't allow you to have both discounted international roaming (voice) and unlimited international BB (data). So I have discounted voice, and pay by the drink for international data.
I travel frequently internationally (I've been to 6 countries in the last 2 months) -- most of my trips are for 1-2 weeks. I've experienced an international data charge of ~$20 for most months vs international voice of anywhere from $50 to $400 extra, depending on usage and which country. My data usage tends to be mostly email, with some minor web browsing (news checking mostly).