Tom Yager writes in A glimpse at a true superphone that a mobile messaging device, no matter how fancy, must meet the standard for reliable mobile e-mail set eight or nine years ago by the two-way pager, and alive today in BlackBerry devices.Is iPhone just a lightweight push e-mail player, and not up to the Blackberry challenge? Do you need such real-time e-mail, and are you willing to pay for it with your cellular provider (certainly a consideration for many, and considered by Apple in not going the BlackBerry Connect route)?Have your say, below. Technology Industry