Where do we sign up for Project X for Blackberries?
Don't forget about the BB's, there are far more BB's in use than iphones.
Do you really want to cut off tons of your users just because they have something different?
The correct way to write 'apps' is just write it in html so they can be used by all mobile devices via a browser. Better to write programs in one universal format than be locked in to proprietary formats and have to do re-writes for each individual device.
From what I see on the boards there are many users with many devices, all trying to do the same thing: access this web site and services from their mobile device of their choice.