malbec
blackberry: more business oriented and better synchronization with the school
iphone too much distracted applications
Blackberry no longer has much of a discernable business advantage over the iPhone... Apple has made major strides towards making the iPhone more business friendly, with better security features and enterprise integration.
Apps will only distract you as much as you let yourself get distracted by them. The iPhone is in many ways a superior productivity tool to the Blackberry because of it's elegant design and user-friendly interface.
As you can see I'm a little bit biased towards Apple, even though I come from the land of RIM (Ontario). At the end of the day it's a personal choice. Both devices are excellent.
We haven't even mentioned Android, which is a pretty killer mobile OS.