Why not? After all, iPhone combines three amazing products: a revolutionary mobile phone, a wide screen iPod and a breakthrough Internet device with rich HTML email, web browsing, searching and maps. Those featured coupled with great communications and productivity tools for business professionals, make iPhone a cool device for corporate users.
Many analysts think right the opposite. Nevertheless, AT&T have decided to appeal to the corporate sector. The full offering can be found here: https://www.wireless.att.com/business/iphone/?bref=IB0003j3709n1441.
I think this is a right time to "introduce" iPhone to the corporate sector. According to Associated Press, IBM will be introducing Lotus Notes package for Apple's wonder device.