Apple unveils feature to rival BlackBerry

"Try leaving your Apple iPhone open while 3G roaming in Taiwan for a week and see what kind of bill you get," said Barak in a RCR Unplugged story. "Just try it. I dare you. And sure, it works on Wi-Fi, but who cares, so does Google chat."

That's a funny statement - it takes away all the benefit that imessage provides because most of the high-end users do travel a lot .... but who knows apple may do something about it in few months and give a final blow to BBM.