[gcv]

How is this substantively different from the Skype iPhone application, with an in-bound phone number? The major usability barrier to me there is the inability to have Skype run in the background on the phone (reasonably so, since it would kill battery life); does Line2 somehow work around this?

Edit: Never mind, I should have finished reading the article before posting. Line2 routes calls through the cellular network when the app isn't running.