We released our Nemertes Impact Analysis on the new Apple iPhone tonight. You can read it here.
In it, we discuss the potential issues of enterprise usage of iPhones, including such missing pieces as support for Exchange or Notes calendar and contact synchronization, tools for enterprise security and management policy enforcement such as encryption of data on the device, and ability to remote wipe it, and the lack of enterprise-grade support services.
In my opinion, there is a considerable opportunity for Apple to attack the enterprise space, but they continue to put their resources into consumer products (with the exception of niche software focused on media developers, and of course the MacBook Pro), and who can blame them given the relative market sizes.
But I'm still awaiting the day when a large services provider or vendor such as IBM or maybe even Dell steps up to the plate and begins to offer enterprise support services for Apple products such that Apple becomes a serious alternative to the Windows desktop, as well as Windows, RIM, and Palm mobile devices.