Following numerous delays, BlackBerry Messenger (BBM) finally arrived last month as a free download on iOS and Android as the Canadian smartphone maker's survival remains uncertain. The app saw five million downloads in the first eight hours of availability, emerged as the No. 1 on the iTunes download charts and brought a cool 20 million new users to the BBM platform within a week. BlackBerry tweeted today that the iPhone-only release would get updated later today to support Wi-Fi-only iPhone touch and iPad devices.
The new version is live now, but there's a catch...