iPhone's biggest hurdle will be businesses. Not start-ups, but big corporations. This is Blackberry's party, and I don't see anyone changing that soon. That sa

iPhone's biggest hurdle will be businesses. Not start-ups, but big corporations. This is Blackberry's party, and I don't see anyone changing that soon. That said, I don't think that's really what iPhone is intending to do, at least not yet. Comparing the two is a little premature, really.