Blackberry. It has the advantage of a real keyboard.
The Iphone is very fingerprint friendly, fragile, if your adored pet eats your headphones (which also contain the free hand mike), replacing it will cost enough you'll want to cook the pet
. Plus also internet works well, but it really depends on the reception, so it can be slow or fast.
Typing a text message or an email also takes some practice, but apparently it's something you get used to quickly.
You will also have to use Itunes.
On the other hand, the Iphone looks great, cool and it has obviously a lot of features, like being also an mp3 player, and think, podcasts ! The add-ons you can get for free or buy are almost endless. Just a few days ago i saw in the public transports a man playing Scrabble on his phone !
It's my own personal opinion but everywhere i turn it seems everyone owns one, so just to be anticonformist i would get a Blackberry. Maybe Karren would be able to tell you more about it.