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Funambol announced today it has released an open source native app for iPhone contact synchronization. The Funambol plug-in for iPhone synchronizes the iPhone’s address book with contacts from popular sources such as Yahoo! Mail, Gmail, Microsoft Outlook, GNOME Evolution and SyncML servers such as the Funambol server.

Until now, contact synchronization on the iPhone was possible only
using a cable connected to a computer running iTunes. The new Funambol
plug-in is the first open source native app for iPhone address book
synchronization. To learn more, view screenshots and download the software, visit http://www.funambol.com/solutions/iphone.php.

Source: Funambol press release