SDK released today, iPhone software update in June

Despite inaccurate reports prior to today's event, a software development kit for the iPhone is available to developers today as a free download (the iPhone Dev site is currently down for maintenance). Joining the iPhone developer program -- which will provide technical support, code testing and allow distribution through the "App Store" -- costs $100.

The iPhone 2.0 software update -- which allows end-users to run iPhone applications and includes a bevy of enterprise-related enhancements, including Exchange support -- will be released as a free update in June.

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