On the enterprise side, iPhone OS 4.0 offers improved data protection with email encryption. Developers will be able to access APIs for encryption. Mobile device management in the OS enables solutions from companies like Sybase to be used for deploying large numbers of phones.

Wireless application distribution in version 4 enables user companies to distribute applications wirelessly to iPhone units from their own server. Also featured is support for multiple Exchange mail accounts on a single phone and support of SSL VPN capabilities.

"The iPhone has made huge inroads in enterprises," Jobs said. "Already, more than 80 percent of Fortune 500 companies are using iPhones."

But anyone holding out hope for Jobs to soften up on Apple's policy of not allowing Java or the Flash plug-in on iPhone OS had hopes dashed. Asked if Apple's stance in this regard would change with iPhone OS 4, Jobs responded with a simple "no."  Jobs has cited an emphasis on the budding HTML5 specification as a substitute for the otherwise-ubiquitous Flash; Jobs also has been dismissive of Java on iPhone devices.