Just a little thought here: Whatever phone Barack Obama does use is going to rake in a lot of money. I live in Manhattan, and every day on the path between the S train and the 4,5,6 line, there are old black women selling signs and calendars that say "BARACK OBAMA-THE PROPHECY FULFILLED." Black people look up to this guy as much as they looked up to Shaft. So as much as I hate to say it, it does matter what kind of phone Barack Obama uses.
As a side note: I really hope that if he does use a Blackberry, they disable Brickbreaker. I don't want him playing games during his briefings and meetings on foreign policy issues.