Some of the initial criticisms of the iPhone revolved around the device's lack of corporate-integration features and standards. Initially the phone was more suitable as an executive toy, a device that people managing their own schedules would be able to use, but was unsuitable for general standard issue within an infrastructure.
Apple has demonstrated its willingness to adapt and evolve its existing products by working with corporate customers on needed improvements to make the device more suitable for larger scale implementation on the employee level.
At the iPhone software development roadmap event, Apple unveiled its changes that stand to make all the difference, and likely propel past Blackberry as the ultimate business communications tool.
Push email has been integrated- previously, the device was only capable of receiving new emails from a periodically updating server, that would scan and retrieve emails over periods of 15 minutes or so. While this is perfectly functional for most everyday people, it fails to take into account the extremely time-sensitive nature of corporate communications.
With the new firmware update, the device will use a form of push email that immediately delivers messages straight from the email servers- and they have added support for Microsoft exchange, which is widely used for office email.
Push technology has also been expanded to the contacts and calendar, enabling organizations to instantly configure the data which it needs on its employee's devices. Employees will benefit from having everything they need to know automatically sent to their phones, no matter where they are.
There is also a critical security feature that allows the adminstrative utility to remotely wipe and disable a specific iPhone if it is lost or stolen. This is critical for corporations that have extremely sensitive internal information stored on the device.
Personally, I could see these improvements propelling the iPhone to its intended place as the quintessential smartphone and integrated communications device.
Look for Karl Rovian political attack squads wielding them when election season hits full swing.

