Today at 10:00am PST, Apple made several announcements at an invitation-only press conference, including the availability of a Beta version of their iPhone 2.0 software that includes a Software Development Kit (SDK) and support for the Exchange ActiveSync protocol for use on the iPhone.

For more information on Apple's licensing of Exchange ActiveSync, see the Q&A with Terry Myerson at http://www.microsoft.com/Presspass/Features/2008/mar08/03-06EASqa.mspx, as well as the announcement from Apple here and here.  Be sure to check out the Exchange Team blog post on this, as well.

 See what others are saying:

 http://www.engadget.com/2008/03/06/iphone-heads-to-enterprise-ville-with-tktk-support/

http://gizmodo.com/364719/apple-hops-aboard-enterprise-push-email-and-calendars-activesync-and-exchange-support