I will NEVER go back to BlackBerry. In the first 48 hours of having an iPhone, I threw about 10GB of music into it (I got the 32GB version), downloaded all sorts of fun apps like Battleship, flight trackers and currency converters, a Russian calendar with information on whose ??????? (name day) it is, the apps for Facebook, Wikipedia, the New York Times and the Wall Street Journal (I can't find one for The Economist, though, oddly) and sync'ed the phone with all my e-mail accounts nearly automatically (I had to adjust the Port number for outgoing mail on one account but other than that all the information was automatically pulled from Outlook).

I have the International keyboard on and can type in Russian and Chinese (the BlackBerry had a screwed up function for typing in Russian that messed up the Russian keyboard layout and this was after a long time struggling to get the software loaded into it).

I'm sure that the Droid-based phones are similarly easy to work, but regardless of whether I stay with Apple I will never go back to BlackBerry.